Definition of thin in US English:

thin

adjectivethinnest, thinner

  • 1Having opposite surfaces or sides close together; of little thickness or depth.

    ‘thin slices of bread’
    • ‘Once you have bunched four or five sprigs together, wind thin wire around the cluster, leaving a one-inch spike at the bottom.’
    • ‘The thin bark had been stripped all the way around for two to three feet.’
    • ‘Polycarbonate is a tough, transparent thermoplastic that's used to make thin, light lenses.’
    • ‘One particular 20 yard stretch of rail is held down on one side by just one thin clip; the rest are either missing or so bent that they are not securing the rail at all.’
    • ‘Only a thin layer at the surface thaws during summer.’
    • ‘Creeping plants such as the ivy may be joined together by thin wire.’
    • ‘The key lime was pleasantly tart, on a nice thin crust.’
    • ‘Generally, the cylinder and the cylinder head bolt together with a thin gasket pressed between them to ensure a good seal.’
    • ‘These traditional Italian style pizzas are thin and crisp and loaded with delicate, subtle flavours and topped with mozzarella cheese.’
    • ‘Homemade decorations using herbs such as cinnamon sticks and whole star anise can be strung together with thin ribbon or raffia and hung from the branches for a different look.’
    • ‘The stations were separated by thin partitions and the side walls were painted drywall.’
    • ‘To serve, place the salmon skin side down and slice horizontally into thin pieces.’
    • ‘Another method of treatment is acupuncture, which involves the insertion of thin needles into the body to regulate and redirect the flow of qi.’
    • ‘The pudding is made by lining a buttered basin with fairly thin slices of good bread cut to fit exactly.’
    • ‘He shook his head and pressed his lips together in a thin line.’
    • ‘It lifts a thin surface layer of the cornea away from underlying layers.’
    • ‘The keypad lights up a shaded blue, and the buttons are thin and stylish.’
    • ‘There is a relatively thin crust of ice, but most of the water is liquid.’
    • ‘He pulled out a thin strip of metal and put it into the lock.’
    • ‘It was a simple dish made up of thin slices of perfectly cooked beef and onions, served with a generous amount of a light gravy with hints of Asian flavourings.’
    narrow, fine, pencil-thin, thread-like, attenuated
    wafer-thin, paper-thin, papery
    View synonyms
    1. 1.1 (of a garment or other knitted or woven item) made of light material for coolness or elegance.
      • ‘Will ran towards the outer courtyard, Sibyl in close pursuit, noticeably slowed down by her thin shoes and bulky dress.’
      • ‘And the thin jacket she'd worn did nothing to ward off the distinct chill that heralded coming rain.’
      • ‘She wore a thin shirt, and long skirt, with high heels to make her seem taller.’
      • ‘Her veil was thin, and woven and accommodated little sprinkles everywhere.’
      • ‘Only thin sleeves split down the inside covered her arms.’
      • ‘He was smiling openly at her, wearing just a thin shirt and trousers.’
      • ‘The woman was only wearing a thin jumper and was shivering, so the girls braved the cold wind and Danika gave her coat to the woman, while Jody donated her scarf.’
      • ‘The neckline curved down low, and was layered under a thin see-through material that shimmered.’
      • ‘Lining one side were six feather pillows and covering the floor was a thin rug on which sat a bottle of wine and two glasses.’
      • ‘The weather was fairly warm for Spring, so the boys were fine in their thin clothing.’
      • ‘Wear a warm hat to guard against heat loss from your head and if your hands are susceptible to the cold then wear some thin gloves.’
      • ‘Spraying repellent on clothing can be useful, as mosquitoes can bite through thin fabrics.’
      • ‘The ground was very wet and I felt it almost at once through my thin boots.’
      • ‘His muscular chest was well defined through the thin shirt he wore.’
      • ‘A thin, translucent organza material partially hid the silver tasseled white sheets from view.’
      • ‘Her own shoes were so thin, and her steps so graceful that they hardly made a sound.’
      • ‘She began to feel her thin shoes break under her, and the muscles in her thighs started to burn with fury from the intense climb.’
      • ‘The cigarette burned a hole in Adam's thin sleeve and stung his arm.’
      • ‘Wear layers of thin clothes rather than one thick layer - the warmth from your body will get trapped between the layers, keeping you warmer.’
      • ‘The dress was long, but the thin material was light and loose, making it easy to walk and move.’
      lightweight, light, fine, delicate, floaty, flimsy, diaphanous, gossamer, insubstantial
      View synonyms
    2. 1.2 (of a garment) having had a considerable amount of fabric worn away.
      • ‘His too-big jeans were ripped in the knees, and his tee shirt was worn into a thin fabric.’
      • ‘They both were wearing very thin shirts with a ton of holes in them.’
      worn, well worn, old, worn out, holey, moth-eaten, mangy, ragged, frayed, tattered, battered
      View synonyms
    3. 1.3 (of script or type) consisting of narrow lines.
      ‘tall, thin lettering’
      • ‘It reminds me of the old digital watch I had as a kid, with thin black lettering on the grey screen.’
      • ‘In thin gilt lettering on the creamy white of the menu, how little those words conveyed to the bulk of the imperfectly educated diners.’
      narrow, fine, pencil-thin, thread-like, attenuated
      View synonyms
  • 2(of a person) having little, or too little, flesh or fat on their body.

    ‘she was painfully thin’
    • ‘I almost felt sorry for Nicola, who's grown painfully thin.’
    • ‘If you're naturally thin, you might fill out a little more after puberty, but then again, you might not.’
    • ‘His baggy black clothing made him look thin and weak.’
    • ‘The director is tall and thin with good posture, and he appears neither old nor young.’
    • ‘She looked very thin, weak and pale and was shivering.’
    • ‘She is skeletally thin, with hollow, cadaverous eyes and cheeks.’
    • ‘Lily, on the other hand, was dark headed, short but thin, and relatively quiet.’
    • ‘His face was just a little pale and he was thin; nowhere close to looking starved, but he was thinner than he should be.’
    • ‘It was a woman, tall and thin, smiling and leaning against a fence.’
    • ‘So what motivated her to drop from a healthy 130 pounds to being so thin that today she wears a pair of flannel pants under her size one jeans just to hold them up?’
    • ‘Rakishly thin, he wore tattered cords that rode half way up his skeleton legs.’
    • ‘He is so thin and reedy you worried for his balance when the wind picked up, but he moves with soft, sumptuous delicacy.’
    • ‘They were an oddly diverse group, one man was short and heavy, two others were tall and muscular, and the other two looked rather thin and weak.’
    • ‘He was already walking a fine line between thin and skeletal when we met, but now he just looks ill.’
    • ‘If you could point to a line of fat or thin people stretching back generations, I'd accept that, but in general the number of people whose body shape is determined by their genes is very small.’
    • ‘He was thin but far from weak and stood about six-foot tall.’
    • ‘He got thin and weak and seeing my father like this was not the easiest of experiences in my life.’
    • ‘I see a thin, bearded guy wearing a thick turtleneck sweater, spooning coffee into a mug in his small flat, scowling at the newspaper.’
    • ‘And the public wonders why people in the fashion industry are so thin!’
    • ‘He was thin and weak, and his voice was almost inaudible despite the relative quiet of a teaching hospital side room.’
    slim, lean, slender, rangy, willowy, svelte, sylphlike, spare, slight
    View synonyms
  • 3Having few parts or members relative to the area covered or filled; sparse.

    ‘a depressingly thin crowd’
    ‘his hair was going thin’
    • ‘There seems to have been at most a thin trickle of men directly from northern France into Scotland, and there is little evidence of migration directly from the Continent to Ireland.’
    • ‘The forest started to looked thinner, and he thought he'd found something.’
    • ‘Others argue that allied troops are too thin on the ground to make any difference.’
    • ‘Their fur was thickest in patches on the head and groin, elsewhere it was thin and limited.’
    sparse, scanty, wispy, thinning
    meagre, paltry, poor, inadequate, insufficient, sparse, scanty, scattered
    View synonyms
    1. 3.1 Not dense.
      ‘the thin cold air of the mountains’
      • ‘Such journeying to cold, high places where the air is thin requires lengthy preparation for the most severe conditions conceivable.’
      • ‘She said she had recently hiked for four days in the thin air of Yosemite National Park.’
      • ‘In addition, she suffers from asthma, which makes mountain races, where the air is thin, particularly difficult.’
      • ‘Its average elevation is 13,000 feet, making the air rather thin and cold, and ten peaks top 20,000 feet.’
      • ‘Winding down My head ached, and my throat was dry from the dehydrating effects of flying, and too much cold, thin air.’
      • ‘Therefore, the air is thin, dry and your body receives about 50 percent less oxygen than at sea level.’
      • ‘The day dawned gray and chill, a thin mist turning Baghdad's usually dry air damp.’
      • ‘A hole has been torn in the thin veil of ozone just above the Antarctic.’
      • ‘The morning started fine, with a little high thin cloud, but still and very cold.’
      • ‘Last weeks's scorching heat in Jakarta happened because the humidity in Jakarta was low and the clouds were thin, so the heat of the sun was unobstructed.’
      • ‘She has trained at Flagstaff in Arizona, again using the thin air at high altitude to stretch her limbs and clear her mind.’
      • ‘He wrote about what it was like to live and die where the air is so thin that every breath is a triumph.’
      • ‘A thin veil of fog had rolled in off the bay, obscuring his view and coating the area in a pale gray-white mist.’
      • ‘The air is thin up there, and only the most able should attempt to scale those peaks.’
      • ‘You are about 27,000 feet up in the Earth's atmosphere, the air is thin, you are using an oxygen tank.’
      • ‘The air is so thin it is incapable of supporting life.’
      • ‘The route itself can be slick and frozen over, and exhausted runners may be prone to hypothermia in the thin, cold air.’
      • ‘They hope to complete the trek in five days, but it presents problems because they will be walking at altitudes of up to 14,000 ft, where the air is thin.’
      • ‘So some astronomers are quite keen to set up their instruments in Antarctica to take advantage of the thin, cold air.’
      • ‘The air was thin up here, but he was used to going up high and knew how to control his breathing so he didn't get lightheaded.’
    2. 3.2Climbing Denoting a route on which the holds are small or scarce.
      • ‘There is a bolt right before a thin little crux move.’
      • ‘Follow the thin right fork through to easier ground and the top.’
      • ‘This is a shoe that excels when face climbing or thin crack climbing.’
      • ‘Fifteen feet of traversing to reach a thin finger crack lay ahead.’
      • ‘There, a series of thin moves leads you up the remainder of the corner, then you end up facing a traverse to the right under a huge, overhanging roof.’
  • 4Containing much liquid and not much solid substance.

    ‘thin soup’
    • ‘He painted in thin oils with a bright palette in a freely painted technique which allowed the white of the exposed canvas to give added luminosity.’
    • ‘Yet, there really was nothing unusual about the soup, merely a thin beef broth with onions.’
    • ‘If the liquid is too thin for a gravy, just put it in a pan on the stovetop and boil it down to reduce to a nice consistency.’
    • ‘Twice a day inmates receive two pieces of dry bread and weak tea; at midday they are handed a portion of soup or thin gruel.’
    • ‘If there is only a slight excess of sugar over the normal saturation level, the supercooled liquid is a thin syrup.’
    • ‘The surrounding tissue swells up and thin pus leaks through narrow passages called sinuses onto the surface of the skin.’
    • ‘In a dark corner, two fighters are dozing while a thin potato and lamb soup simmers on the stove.’
    • ‘Regardless of its ethnic origins, it will be a thin, brown liquid, made from fermented fish and salt.’
    • ‘The mild tartness of the thin liquid cut through the dust and diesel fumes.’
    • ‘In any case, the fluid is clear and thin but quite strong, and isn't easily rubbed into skin.’
    • ‘The béarnaise sauce was now so thin and runny it had the consistency of water and didn't taste good at all.’
    • ‘Rarely, a patient may be limited to foods with a pudding consistency if thin and thick liquids are freely aspirated.’
    • ‘Do not swallow anything until it is a thin liquid pulp.’
    • ‘At the moment the boys exist on an unchanging and meagre diet of bread and milk for breakfast, potato and rice for lunch and thin vegetable soup for dinner.’
    • ‘If no frank perforation is seen, thin barium liquid should be used to identify lacerations that may otherwise be missed.’
    • ‘If you are one of those frailer and more malnourished types, you should eat light nourishing soups or thin rice porridge.’
    • ‘A thin cornmeal soup was frequently made, to which pieces of meat, fish, or other foods could be added.’
    • ‘He invited the wealthy man to dinner, which consisted of old hard bread and thin vegetable soup.’
    • ‘In several test tubes and bottles were thin, multicolored liquids.’
    • ‘They can vary in size and contain liquid that is thin and watery, or thicker and paste-like.’
    watery, watered down, weak, dilute, diluted, thinned down
    View synonyms
  • 5Too weak to justify a result or effect; inadequate.

    ‘the evidence is rather thin’
    • ‘My only gripe is that, for the price, it's a little on the thin side.’
    • ‘But as a reason to renounce my citizenship, it's a thin one.’
    • ‘The film is really just a series of slickly filmed action sequences dangling off a thin plot and held together by the force of Jackson's charisma.’
    • ‘The plotline is relatively thin, relying on the quantity of ghosts and potential gruesome deaths to keep the story going until its climatic end.’
    • ‘Could there be a connection between fat pay for directors and thin returns for shareholders?’
    • ‘Further investment in players may improve their weak defence or thin squad, but would disrupt the team spirit which has thus far carried them to the heady heights of fourth.’
    • ‘He also tried to dispel the belief that the government had a thin legislative agenda.’
    • ‘It's weak, it's thin, it's insipid and it's desperately unsatisfying.’
    • ‘Mr. Bennett also thinks that I run a pretty thin political blog and shouldn't have been nominated in that category.’
    • ‘Such an attitude is a thin cover for right-wing politics.’
    • ‘This form, music video, paired popular songs with series of incoherent images held together by thin narratives.’
    • ‘He was their speed receiver, and his departure leaves them thin at the position.’
    • ‘If formal sources of law, and the law they produce, have become too thin and weak for the tasks they should accomplish, supportive normativity may be found in tradition.’
    • ‘His confessions of guilt are merely a thin cover for re-emergent desires within the German ruling class.’
    • ‘It sounds a bit thin compared to finding the cure for diseases or inventing those dimples that make golf balls fly farther, but I am sure it must have some value.’
    • ‘The focus on each is spread a bit too thin, so the connections between them are never clear enough.’
    • ‘Densely plotted and vividly acted, the film's abundance of ideas and intrigue wind up stretched perilously thin.’
    • ‘This vital missing ingredient leaves the characterisation grossly underdeveloped, and the plot, somewhat on the thin side.’
    • ‘The supplements on Disc Two are surprisingly thin and lacking in substance.’
    • ‘I found the explanation for the campaign material disappointing and a bit thin.’
    insubstantial, flimsy, slight, feeble, lame, poor, weak, shallow, tenuous, threadbare, inadequate, insufficient
    View synonyms
    1. 5.1 (of a sound) faint and high-pitched.
      ‘a thin, reedy little voice’
      • ‘If her top notes sound thin, she's matched at the other end of the scale by Paul, whose bottom notes almost disappear.’
      • ‘The string tone is thin, but the sound has an attractive warmth overall.’
      • ‘It's sort of reedy and thin and breathless; she always sounds a bit too worried and self-conscious to really lose herself in the music.’
      • ‘Technically the picture is often subpar, and the sound is rather thin and tinny.’
      • ‘The pictures on the office wall were all of autumn landscapes, the dry leaves matched by the thin, reedy tones of the ageing former revolutionary behind the desk.’
      • ‘The audio isn't quite as good; it sounds thin overall, but you can still easily understand all of the dialogue.’
      • ‘His laughter was thin, though, lacking the warmth of a real man's laughter.’
      • ‘The audio is thin and pinched, with a definite canned quality.’
      • ‘Did it matter if the wee soul's voice sounded a bit thin in the recording studio, so a professional session singer was brought in to beef it up a bit?’
      • ‘The previous CDs had a thin string sound and the bass was simply not there.’
      • ‘While dialog is always audible, the sound is thin and harsh, especially during the music.’
      • ‘Then you hear them reading their poems and instead of rich and resonant voice full of authority and confidence there's a thin, reedy croak.’
      • ‘Behind that sound, hidden in it, was the thin, faint sound of a woman's distant scream, coming from inside the building.’
      • ‘His terror threatened to overwhelm him as he dived for the handlebars with a thin squeak escaping his lips.’
      • ‘Her voice was thin and reedy; her throat clicked drily as she tried to swallow.’
      • ‘The sound they made was thin and their dance routines were basic.’
      • ‘His muse, whilst sounding thin and mean vocally, comes to life through her guitar.’
      • ‘But they were uncomfortable and sounded thin and tinny to my ear.’
      • ‘Her once powerful wail was gone, and in its place was a thin weeping sound that broke her mother's heart whenever she heard it.’
      • ‘The vocals are weak and thin, more whiny than appealing.’
      weak, faint, feeble, small, soft, low
      View synonyms
    2. 5.2 (of a smile) weak and forced.
      • ‘Baron stifled his angry response and forced a thin smile instead.’
      • ‘Isabella glanced at Audrey out of the corner of her eye, masking her surprise with a thin smile.’
      • ‘Gwen nodded weakly and Hannah just gave her a small thin smile.’
      • ‘Emerging from the sitting room into the hall, her smile is thin and set and she disappears immediately.’
      • ‘I stood over him, arms crossed, a thin smile on my face.’
      • ‘I especially don't want to be welcomed and have to respond to friendly questions with a thin, watery smile and inane small talk.’
      • ‘She gives him a thin smile and the ticket he'd given her earlier.’
      • ‘Anthony and I stared at him and smiled thin smiles, desperate not to catch each other's eye.’
      • ‘I nod and manage a thin smile that offers her some comfort.’
      • ‘Dylan just stares blankly into the camera with a thin smile on his face.’
      • ‘‘It was quite a nasty fall,’ he explained, a thin smile forming on his lips in recognition of the understatement.’
      • ‘The invitation, offered with a thin smile, comes out of the blue.’
      • ‘She looked paler than ever, but there was a thin smile on her face.’
      • ‘The affection in his voice made her feel a bit better and she settled back into her seat with a thin smile.’
      • ‘One by one, in order of seniority, employees' names were called and they trooped forward to receive a thin smile and an envelope from Eloise.’
      • ‘Troy's thin smile was cautious, guarded, like he was afraid of something.’
      • ‘He gave me a brief, thin smile that seemed more for my benefit than his.’
      • ‘She gave me a thin smile and turned back to whatever she was doing.’
      • ‘A thin smile crossed her face as she turned back to the console.’
      • ‘He sat across from her, studying her with that thin smile.’

adverb

  • often in combination With little thickness or depth.

    ‘cut it as thin as possible’
    ‘thin-sliced ham’
    • ‘The sashimi can be wonderful, cut translucently thin and ingeniously arranged.’
    • ‘The homemade onion rings are even better, cut thin and lightly battered so there's a nice balance between crust and juicy onion.’

verbthinned, thinning, thins

  • 1Make or become less dense, crowded, or numerous.

    with object ‘the remorseless fire of archers thinned their ranks’
    no object ‘the trees began to thin out’
    • ‘Unable to resist such a challenge, I waited for the crowd to thin out and finally introduced myself to an attractive woman with a melodious accent.’
    • ‘They approached the first crossroad and turned right, the road soon becoming smoother and wider as the trees started to thin.’
    • ‘We'll open up at 9am and stay open until 3pm or whenever the crowds thin out.’
    • ‘To thin out thicker hair and give it a softer finish, Campbell prefers razor cutting over buzz cuts.’
    • ‘His prodigious belly shrinks and his beard thins.’
    • ‘The crowd began to thin out so early it looked as if someone had spread a rumor that the police were going to raid the place.’
    • ‘The whiting have started to thin out although the blackfish have picked up a bit.’
    • ‘I have bare patches around the edges and thinning areas in the middle.’
    • ‘While they are effective, side effects can include loss of libido and bone thinning.’
    • ‘But when it comes to the lost causes, the inevitable setbacks, the small defeats, the crowds thin out quickly.’
    • ‘After a few miles our path curved away from the river, the trees thinned out, and we came upon, wonder of wonders, a proper town.’
    • ‘The crowd began to thin out but not so that the bar was entirely empty.’
    • ‘The celebration continues through Sunday when the crowd begins to thin out.’
    • ‘At first I thought I was just imagining it, but then it became clear that the trees were thinning out.’
    • ‘As they walked, the ground gradually began to level out and the trees thinned.’
    • ‘Beyond here, the path dawdles up past imposing villas and more humble caprese dwellings until the houses thin out and the going gets steep.’
    • ‘Mini-grafts of hair are harvested from the back of the head and replanted in thinning areas of hair.’
    • ‘As their numbers thin out, they turn on each other, in an attempt to figure out who is the killer.’
    • ‘Perhaps the most telling sign of the night was that the crowd actually started to thin out as their set continued.’
    • ‘He floats down river in this fashion and before long, the trees begin to thin.’
    become less dense, become less numerous, decrease, diminish, dwindle, lessen, become less in number
    prune, cut back, trim
    View synonyms
    1. 1.1with object Remove some plants from (a row or area) to allow the others more room to grow.
      ‘thin out overwintered rows of peas’
      • ‘Try growing some in a large clay pot, thinning the seedlings as they grow to just 1 or 2 per pot.’
      • ‘Seven days after planting, the seedlings were thinned to one plant per pot.’
      • ‘When the tops of the carrots grow thicker, thin them to about two to three inches apart.’
      • ‘Rows were thinned to provide an even plant spacing and each plant marked with a numbered stake.’
      • ‘You should thin the seedlings until they are about one foot apart.’
      • ‘The plants need to be thinned to about 150 mm apart, unless you want to grow them closer together for young and tender mini-leeks.’
      • ‘The rule specifically gives the U.S. Forest Service the power to build a road, fight a fire or thin an area to reduce fire risk.’
      • ‘Seven days after sowing, each pot was thinned to 11 plants.’
      • ‘Do you feel guilty when you have to thin out seedlings?’
      • ‘Some of the trees have grown so fast that decisions need to be made as to whether they are to be thinned or allowed to develop into copses.’
      • ‘If too many seedlings appear, thin the plants to about 5 inches apart.’
      • ‘The plants were thinned 10-12 days after germination to give an average of 20 plants, uniformly distributed per pot.’
      • ‘Plants were thinned to five plants per pot after seedling emergence.’
      • ‘When your plants start to show a couple of leaves, thin them back a little, then a little more as they get taller, until they're at least eight inches apart.’
      • ‘Another crucial key to success is thinning seedlings, especially those that have broadcast directly into beds.’
      • ‘It is hoped that by thinning the area around the veteran oaks, it will encourage the public to enjoy the view of the trees.’
      • ‘After germination, seedlings were thinned to five plants per pot.’
      • ‘The plants are best thinned to about 15 inches apart because of their spreading habit.’
      • ‘The seedlings were later thinned to two plants per pot.’
      • ‘In all experiments, rows produced by paper-ribbon sowing were thinned to one plant per site immediately after seedling emergence.’
    2. 1.2 Make or become weaker or more watery.
      with object ‘if the soup is too thick, add a little water to thin it down’
      no object ‘the blood thins’
      • ‘Specialists can diagnose the condition with a simple blood test, and treatment normally includes medication to thin the blood.’
      • ‘This thins the blood and can help to prevent the clot that is blocking the coronary artery from spreading.’
      • ‘Garlic also thins the blood - so be aware it may increase bleeding.’
      • ‘If the policemen had questioned the mother, she could have explained that her son required regular injections to thin his blood because of a thrombosis.’
      • ‘Neither would I want to give them large amounts of garlic, which thins blood in a similar way.’
      • ‘I have had heart bypass surgery and am on medication to thin my blood.’
      • ‘Pureed and thinned with a little stock syrup, it makes a coulis to accompany baked lemon cheesecake or a passionfruit mousse.’
      • ‘Although the benefits of ginkgo are not clearly understood, it is believed that it may improve blood flow to the brain by thinning the blood.’
      • ‘Add enough water to thin the consistency of the dressing so it can be drizzled over salad.’
      • ‘Aspirin has been used to treat heart disease because it thins blood and prevents clots.’
      • ‘Oil paint can be thinned to a watery consistency or brushed on with thick luscious strokes.’
      • ‘Warfarin protects those with heart problems by thinning the blood in order to prevent clotting.’
      • ‘Jordan has to take aspirin every day to thin his blood, and has been told he could be on medication for the rest of his life.’
      • ‘Aspirin's ability to thin the blood has led to its use in preventing heart attacks and strokes.’
      • ‘Although these drugs are sometimes called blood thinners, they do not actually thin the blood.’
      • ‘The chemical, salicylic acid, is an active ingredient in aspirin, which is known to thin the blood and reduce the risk of heart disease and bowel cancer.’
      • ‘Because vitamin E can thin the blood, high doses might increase the risk of abnormal bleeding.’
      • ‘Heat through, adding water to thin to desired consistency.’
      • ‘A side effect common to all anticoagulants is the risk of excessive bleeding, due to the blood being thinned.’
      • ‘Taking supplements, even vitamin E, known to thin blood, is safe.’
      dilute, water down, weaken
      View synonyms
  • 2Make or become smaller in width or thickness.

    with object ‘their effect in thinning the ozone layer is probably slowing the global warming trend’
    no object ‘the trees have thinned and diminished in size’
    • ‘The body reaches a thickness of 80 m at Hagevatnet and thins towards the south.’
    • ‘Posteriorly, the pterygoid thins to less than 1 mm in thickness.’
    • ‘Over the past 40 years, the Arctic ice pack has thinned and shrunk significantly.’
    • ‘Many doom and gloom headlines often scream about the ozone layer thinning over the poles, and this has given some people the idea that ozone is a harmless gas that protects us from the rays of the sun.’
    • ‘At Kimmeridge 3, the sandstone body maintains its thickness before thinning rapidly toward Southard Quarry.’
    • ‘The sheet has a maximum thickness of 4 meters at the south end of Flint Ridge State Memorial and an average thickness of 1.5 meters, thinning toward the edges.’
    • ‘The ash is local in occurrence; its maximum thickness is about 1m, but it thins laterally to a few tens of centimetres over about 40 m.’
    • ‘Today Science tells us the speed of light is decaying, the magnetic field is collapsing, the earth is slowly beginning to wobble on its axis, the protective ozone layer is thinning.’
    • ‘Since 1978 Arctic sea ice area has shrunk by some 9 percent per decade, and thinned as well.’
    • ‘This video shows the Antarctic ozone layer thinning during 1998, reaching its thinnest in the southern spring.’
  • 3Golf
    with object Hit (a ball) above its center.

    • ‘The other important moment of his round came soon after noon, when first he mishit his five-iron on the 17th, then thinned the ensuing bunker shot.’
    • ‘The lie was not great and the shot was slightly thinned, the ball finishing as much as 40 feet past the cup.’
    • ‘That was as close to the ball as you can get without thinning it.’
    • ‘Disaster strikes when he thins his pitch from the rough beside the 10th green all the way across the putting surface.’

Phrases

  • thin air

    • Used to refer to the state of being invisible or nonexistent.

      ‘she just vanished into thin air’
      ‘they seemed to pluck numbers out of thin air’
      • ‘Immorality prevails as sympathy for the unfortunate diminishes into thin air.’
      • ‘I don't think I can conjure up the kind of detail required out of thin air.’
      • ‘Surely all these people didn't just pluck these things out of thin air and just put them down on paper!’
      • ‘In any event, it was a bravura performance, a long extempore speech, apparently pulled out of thin air.’
      • ‘None of this stuff is new, and who's to say it won't all vanish into thin air?’
      • ‘Teaching unions have also joined force to ask how millions of pounds have seemingly disappeared into thin air.’
      • ‘They all thought I was so smart but little did they know that I pulled that answer from thin air.’
      • ‘We've seen in the collapse of many technology companies that figures were plucked out of thin air.’
      • ‘The museum's alarm went off, but by the time police arrived the culprits had disappeared into thin air.’
      • ‘He disappears, as if into thin air, leaving me clutching his money in one hand and mine in the other.’
  • the thin blue line

    • informal Used to refer to the police, typically in the context of situations of civil unrest.

      • ‘The repainted patrol cars and bright yellow jackets may seem gimmicky to those who favour the traditional image of the thin blue line.’
      • ‘Jack, who retired last Friday from Leigh's community policing team, has been treading the thin blue line since 1974.’
      • ‘Ex-policemen across Bury are being asked to strengthen the thin blue line.’
      • ‘But the thin blue line will be stretched thinner than ever - at least 2,000 officers will cover the main rally in July, more than one in eight of all the officers in Scotland.’
      • ‘Her description of the thin blue line that stands between the public and chaos looks different from the one portrayed on television.’
      • ‘Look at the tough new border controls and the co-ordination of European police forces manning the thin blue line against the horde.’
      • ‘His self-assurance, generated by his exalted status within the department, is complete; it's what guides him during his regular sorties across the thin blue line, from order into chaos and back again.’
      • ‘Every weekend, a group of twenty-somethings turn their backs on Swindon's clubs, pubs and bars to help boost the thin blue line.’
      • ‘People living in rural areas need to take precautions and taking care also helps the police - the thin blue line in the countryside.’
      • ‘Once the thin blue line defending a society's fundamental values, the police have now grotesquely turned into a weapon against them.’
  • thin on top

    • informal Balding.

      • ‘He was described as 5ft 7in tall, in his 40s or 50s, with light-coloured hair, which was thin on top.’
      • ‘I don't care that he's going thin on top or thick in the middle.’
      • ‘And have you noticed that Ed is looking a little thin on top?’
      • ‘It has been said that a large proportion of body heat lost is through the head and, if you are as thin on top as I am, it is not difficult to believe, so wear a hat.’
      • ‘Boys, you may have noticed I'm no longer going a bit thin on top.’
      • ‘By the way, isn't Tommy going really thin on top?’
      • ‘I bought him a toupee once because he is a bit thin on top.’
      • ‘He's going very thin on top, though, which must be worrying.’
      • ‘She said particular attention should be paid to shoulders and the backs of feet - the most sensitive areas - while men going thin on top should always wear a hat or use sunblock.’
      • ‘He was little, probably a little bit shorter then Adrian and he was a little thin on top.’
      losing one's hair, thinning, with receding hair
      View synonyms

Origin

Old English thynne, of Germanic origin; related to Dutch dun and German dünn, from an Indo-European root shared by Latin tenuis.

Pronunciation

thin

/THin//θɪn/