Definition of leaf in English:

leaf

noun

  • 1A flattened structure of a higher plant, typically green and bladelike, that is attached to a stem directly or via a stalk. Leaves are the main organs of photosynthesis and transpiration.

    Compare with compound leaf, leaflet
    • ‘Then the other way is called transpiration, or water lost primarily from the leaves and stems of the plants.’
    • ‘The egg-sacs are deposited in twisted leaves or may be directly attached to a leaf.’
    • ‘There is no green, but leaves of the plants around that area are yellow.’
    • ‘Plants were analysed by measuring the excised leaves of the main shoot.’
    • ‘This also gives the best possible area exposed to falling rain so the rain is directed back along the leaf and down the stem to the roots.’
    • ‘It makes a decorative house or garden plant with long green leaves and a spectacular flower.’
    • ‘I want to put white lights around their trunks and red lights along the main stem of the leaves.’
    • ‘There were plants with long green leaves in every corner and the curtains were of gold silk.’
    • ‘About two hours later, the yard had almost become a pond, with the green leaves of the plants shining in the rain.’
    • ‘Both have stems, leaves, and reproductive structures, but they look very different.’
    • ‘Individual plant shoots from each category were separated into stem, leaves, and crown.’
    • ‘It has three curved green leaves on each stem, with a large purple blossom in the middle.’
    • ‘Only the tender green leaves growing off the stems are really palatable, so this type of cress requires a bit of prep work.’
    • ‘Plants were dissected into leaves, stems with petioles, and inflorescences.’
    • ‘The female Thrypticus deposits an egg in a water-hyacinth petiole - the stalk that attaches the leaf to the stem.’
    • ‘First check the field for the presence or absence of spider mites on individual green leaves on a corn plant.’
    • ‘Roselle is a woody annual, with green leaves on stems which are usually red.’
    • ‘The stems and large leaves on the stalk combine almost musically to enhance the richness of the composition.’
    • ‘Shoots of M. micrantha were separated into stems, leaves, and reproductive organs.’
    • ‘But coca is a very resilient plant, and fresh green leaves are already sprouting from stalks fumigated a few months ago.’
    1. 1.1Any of a number of plant structures similar to leaves, e.g., bracts, sepals, and petals.
    2. 1.2Foliage regarded collectively.
      • ‘She kept her eyes straight ahead as she flew over the rest of the clearing and then into a dense forest, her bare feet racing and leaping over stone and leaf.’
      • ‘To provide a backdrop to this foliage-ruled leafscape, use climbers to link together canopies of leaf.’
      • ‘Providing you prepare the soil well, and top dress every year with more compost, you can plant climbers quite densely, two or three feet apart, for a wealth of leaf, colour and scent.’
    3. 1.3The state of having leaves.
      ‘the trees are still in leaf’
      • ‘And our interest does not stop when the saplings go into leaf.’
      • ‘For all that it is still March, only a couple of days past the solstice, and few trees are yet in leaf, today could have been a summer's day.’
      • ‘It's a wonderful tree, the only drawback being that it comes into leaf long after most other garden plants, in late spring to early summer.’
      • ‘It is one of the first trees in the arboretum to come into leaf and flowers prolifically with large creamy/pink blossoms in spring.’
      • ‘Groups of bulbs such as daffodils that have become overcrowded and have stopped flowering can be dug up and split whilst in leaf.’
      • ‘It could be that the oak tree will be a clue when it's in leaf.’
      • ‘This, I notice, has come into leaf which could be an indication that roots have formed.’
      • ‘They enjoy a well-drained soil and will stay in leaf until about May, when they die down and lie dormant until the following autumn.’
      • ‘The oak tree is being more cautious, of course, and will wait a while yet before venturing into leaf.’
      • ‘Trees on the opposite bank were bursting into leaf, although the sun was defiantly not shining.’
      • ‘The bare branches of deciduous trees don't muffle noises like they do when they're in leaf.’
      • ‘He wanted to see the trees in his garden coming into leaf.’
      • ‘It is early spring, since the trees are just coming into leaf, and the low grass is still yellowish.’
      • ‘Lift, divide and spread out winter aconites while still in leaf.’
      • ‘Normally elder would come into leaf in late February or March, and into blossom in late April or May.’
      • ‘In fact every tree and shrub in the garden is in bud at least, and some are coming into leaf.’
      • ‘Many said they believe that it's unnecessary to drastically prune trees in the summer just as they come into leaf.’
      • ‘Lilies are better planted in the autumn as they come into leaf very early in the spring.’
      • ‘Outside now that the trees planted last year have started coming into leaf the area is taking on a plaza look.’
      • ‘Lift bedded out begonias while still in leaf; put them in boxes in a dry shed or greenhouse to dry out and die back gradually.’
    4. 1.4The leaves of tobacco or tea.
      [as modifier] ‘leaf tea’
      • ‘Indeed, so smitten is she by alternative therapies that there were reports during the summer of a mercy dash across the country so that she did not have to go without her strawberry leaf tea.’
      • ‘So I got some tobacco leaf, mixed it with water and gave it to the baby.’
      • ‘But if you have a place in your town that sells loose leaf teas, you really need to head down that path.’
      • ‘Richard and Liz say customers comment on the excellent waitress service, quality menu items, and traditional touches such as leaf tea served with a teapot and strainer.’
      • ‘Our tea sales have continued to grow, even our loose leaf tea.’
      • ‘Tobacco, or some stronger leaf, smoulders in the ashtray.’
      • ‘In other words, tobacco used to be a herbal medicine but public experimentation led to the smoking of the tobacco leaf.’
      • ‘Bill, who spends the rest of the year running a herd of pedigree Welsh Black cattle at Trefawr Farm, Llanfyrnach, confided that loose leaf tea was the secret of a good cuppa.’
      • ‘This type of smokeless tobacco comes in loose leaf, plugs or twists.’
      • ‘Although they both carry the taste of the ornage bitterness of the Bergamot, the tea from the whole leaf brew holds on to the tongue far longer.’
      • ‘It is topped off with clove scented apple jelly together with steaming cups of leaf tea brewed from the kettle ever boiling on the hob.’
      • ‘They are whole leaf, natural teas.’
      • ‘Without playing the ‘Elitist Snob’ card too severely, let me just say this: Buy loose leaf tea.’
      • ‘They look like a giant teabag with the leaves missing: a mass of stretchy, white tissue with thousands of perforations.’
      • ‘The tiny tobacconist shop was dark and reeked pleasantly of exotic leaf.’
      • ‘Eighty rupees a kilo for long leaf tea was an unquestionable bargain.’
      • ‘The price of tobacco was high, the purchaser getting enough leaf to balance the silver coins placed on the other pan of the scales.’
      • ‘Was there actual evidence from your client that the tobacco leaf was cut in order to enable it to fit into bags for easy transportation?’
      • ‘The houseboy brings in raspberry leaf tea, and we talk about everything from sex to finances to communication.’
      • ‘I took the raspberry leaf tea with milk from Neville's nanny, but no sugar as it made me restless.’
  • 2A thing that resembles a leaf in being flat and thin, typically something that is one of two or more similar items forming a set or stack.

    • ‘Flat, thin leaves of horn were translucent and used for windowpanes in place of glass.’
    1. 2.1A single thickness of paper, especially in a book with each side forming a page.
      • ‘She pulled it out of her book case and turned the leaves to the page around October of that year.’
      • ‘I took out the loose leaf of paper that had my Kitten drawing on it.’
      • ‘‘That is an incredible price and it is about 10 times more than any Beethoven sketch leaf has ever gone for,’ he said.’
      • ‘Thus, at an etymological level, leaves and paper, and leaves and books are deeply connected.’
      • ‘Against a delicate leaf of paper, the sound of a rapidograph is as raw as the line it produces.’
      • ‘A single leaf surviving in manuscript used to be thought to be a forgery, but is now considered a genuine contemporary copy of part of one scene.’
      • ‘So that he's working on the second gathering, the second four pages, the second leaf, while they are already preparing the parts for the incomplete cantata.’
      • ‘He went over to her and took the book from her hand; still keeping the page he then marked the page with a small leaf of paper.’
      • ‘It works like a book whose leaves have remained uncut - you press down in the middle and the pages come to lie besides each other.’
      • ‘Anne replied on another leaf: ‘By daily proof you shall me find / To be to you both loving and kind.’’
      • ‘It prints off a leaf of paper and spits it at the man in the lab coat.’
      • ‘There stood my ‘sister’, and a small box containing a single leaf of paper.’
      • ‘A leaf of paper tumbled out, folded into a tight square.’
      • ‘They wrote down all their ideas on a fresh leaf of white lined paper and soon filled up both sides of it.’
      • ‘With stifled sobs, she unfolded the single leaf of paper from within and began to read the rigid, soldier-like writing.’
    2. 2.2[with modifier]Gold, silver, or other specified metal in the form of very thin foil.
      • ‘Knapp decorated the sliding hatch in the dining room with gold, silver, and copper leaf on enamel, replacing an earlier plain copper sheet.’
      • ‘Sometimes metallic coatings are applied, e.g. in the form of leaf silver.’
      • ‘The delicate delineations of each square of metal leaf create subtle patterns.’
      • ‘Tiny bits of metal leaf come together like a textured, variegated sheet on craft projects.’
      • ‘To transfer the leaf to the adhesive, use the sheets of tissue that come with the metal leaf, or use waxed paper pieces.’
      • ‘Gold leaf is carefully rubbed onto the lightly glued surface around the tempera and the entire object is then varnished with a gloss finish.’
      • ‘Gold leaf was then used to enrich the surfaces of paintings, sculptures, buildings, pottery and manuscripts.’
      • ‘Gold leaf frames are also a standard for the company.’
      • ‘Twelve pence worth of leaf gold was an expensive amount.’
      • ‘Gold leaf was applied to the background and his tunic, and perhaps the wreath in his hair, after the panel was placed on the mummy.’
      • ‘Gold leaf used in gilding is made in much the same way.’
      • ‘The stacks were then hammered until the gold had spread sufficiently to make a thin foil or leaf.’
      • ‘Malleable, silver may be beaten into a leaf 0.00025 millimeters thin.’
      • ‘On top of this sheet, smooth down a sheet of metal leaf.’
      • ‘Within the cradle of the metal leaf covering was an array of multi-colored lights, each panel serving a different purpose.’
      • ‘Aziz didn't need to ask to know that the gold was not leaf, but real gold, most likely twenty-four karats.’
      • ‘He recently began to put gold and silver metal leaf under the paint, and he uses a hand-rubbing technique to create a soft, antiqued look.’
      • ‘In the early 1970s very thin leaf gold was skillfully implanted on rhodochrosite to make spectacular faked specimens.’
      • ‘Gold leaf has been applied to the clock's numerals.’
    3. 2.3The hinged part or flap of a door, shutter, or table.
      • ‘A large solitary crane takes off to the left, subtly guiding the eye towards the missing leaf of the double door or shutter where the seascape doubtless continued.’
      • ‘Take the old hinge screw or the hinge leaf with you to the store to make sure the new screw is the right size for your hinge.’
      • ‘Place the hinge leaf in the mortise and position the self-centering tool in the countersink recesses of the hinge.’
      • ‘You could have a table that folds down from the wall or even a table with leaves, and throw a dinner party for four in the space the bed would be taking up.’
    4. 2.4An extra section inserted to extend a table.
      • ‘Clear the writing items off the desk, take out the leaf in the table, hide the telephone and get rid of the porcelain figurines!’
      • ‘They are a little like the leaves of a dining table that can be used to make it longer.’
    5. 2.5The inner or outer part of a cavity wall or double-glazed window.
      • ‘Remove the outer brick leaf to damp proof course level and rebuild the walling, ensuring the wall ties are inserted in the correct positions.’
      • ‘In consequence, the tiling could not be nailed at every course and relied solely on the mortar bedding to the outer leaf of brickwork.’
    6. 2.6Any of the stacked metal strips that form a leaf spring.

verb

[NO OBJECT]
  • 1(of a plant, especially a deciduous one in spring) put out new leaves.

    • ‘The dates of observation were 17-19 May 1998, during which the weather was dry with average spring temperatures and the tree canopy had not leafed out.’
    • ‘The eggs were not laid until the last week of April, as the weather warmed up, serviceberry bloomed, and maples, poplars, birches, and beeches were leafing out.’
    • ‘Ash trees were leafing up, the hedges were thick.’
    • ‘Once it leafs out it is a wonderful privacy screen.’
    • ‘The ancient olive trees, budding once more and leafing, feel a bit foolish; how much more absurd is the staff of legends that, stuck in the ground, blossoms.’
    • ‘You can transplant in the spring up until the plants leaf out.’
    • ‘Each plant emerges from an underground rhizome in the spring before the tree canopy leafs out.’
    • ‘There is a downside to leaving it a while, the trees will have leafed up and you won't see so far, but I would wait.’
    • ‘Most trees are leafing out already; some have made significant progress.’
    • ‘You can transplant existing shrubs and perennial plants before they begin to leaf out.’
    • ‘But if you prune back hard or after the tree leafs out in spring, it may be slower to come into bloom that year.’
    put out leaves, bud, burst into leaves
    View synonyms
  • 2Turn over (the pages of a book or the papers in a pile), reading them quickly or casually.

    ‘he leafed through the stack of notes’
    • ‘"All right then, " said the magistrate, leafing through some papers.’
    • ‘I leafed through the stack in my hand.’
    • ‘I've only leafed through a copy, and read the first chapter.’
    • ‘But anyway, she pulled out my folder and began leafing through the papers inside.’
    • ‘You can turn the pages as though leafing through the book.’
    • ‘And, besides, it seems to impress the most attractive men on train journeys when you leaf through the pages of such highbrow reading matter and display interest in more than just the pictures.’
    • ‘How about having a cup of freshly brewed coffee while leafing through pages of an interesting book?’
    • ‘Picking one at random, he leafed idly through it as he let his mind work.’
    • ‘Either study abroad or leaf through the books of some great photographers in the world.’
    • ‘I let him leaf through the first few pages before I spoke up again.’
    • ‘He leafed through a stack of letters, splitting them into bills and correspondence.’
    • ‘As she leafs through the yellow pages, my eyes try in vain to grab a word or two from the looped, fastidious handwriting.’
    • ‘He approached it on tip toes, leafing through a pile of papers on the surface.’
    • ‘Next to that is another device - a page turner that automatically leafs through any book placed on a raised platform, operated at the touch of a button.’
    • ‘Stretched out next to the sofa was Julie, leafing lazily through a magazine.’
    • ‘He was leafing through folders of paper, taking notes on a large yellow pad.’
    • ‘I reached for a poetry book and sat quietly for a while, leafing through the pages.’
    • ‘I noticed that he was leafing through some folders on his desk, and I was struck by a question.’
    • ‘So I did what Pa asked, and leafed through the book, its pages heavy and dusty, well-inscribed and made to last for centuries.’
    • ‘I sat on the cot and leafed through a magazine, shivering silently.’
    flick, flip, thumb, skim, browse, glance, look, riffle
    View synonyms

Phrases

  • shake (or tremble) like a leaf

    • (of a person) tremble greatly, especially from fear.

      • ‘I was shaking like a leaf on the first tee, as nervous standing over the ball as I had ever been in my life.’
      • ‘Looking at her, she seemed to know exactly what he was talking about as soon as she caught sight of Scarlett, who was trembling like a leaf by now at having so many people looking at her.’
      • ‘I was shaking like a leaf, and she told me to ring the police.’
      • ‘‘I mean, I was shaking like a leaf,’ she confesses.’
      • ‘He opened the cellar door and slipped inside in a whisper, shut the door and locked it, and stood there trembling like a leaf.’
      • ‘Roger was the last to cross and his knees shook like a leaf.’
      • ‘Absolutely terrified and trembling like a leaf, I sat down and played for him.’
      • ‘I was really shaking like a leaf when we first showed it.’
      • ‘Just thinking about it makes me shake like a leaf.’
      • ‘She breathes heavily and, although trembling like a leaf from the shock, she succeeds in untying herself.’
  • take a leaf out of someone's book

  • turn over a new leaf

    • Start to act or behave in a better or more responsible way.

      • ‘I had these, but now I'm going to turn over a new leaf and that's all there is.’
      • ‘He seems to have genuinely turned over a new leaf.’
      • ‘Avery's response is to turn over a new leaf.’
      • ‘He appears to have turned over a new leaf - though how long it lasts remains to be seen.’
      • ‘A reprieved Dr Rob turns over a new leaf, and places an illustrated lonely hearts ad.’
      • ‘Is he turning over a new leaf?’
      • ‘The stores are never empty and the oligarchs have turned over a new leaf.’
      • ‘He is pleased to have finally turned over a new leaf and is looking forward to a bright future.’
      • ‘It's the time of year for turning over a new leaf and resolving to be a New You.’
      • ‘Apparently the boy has turned over a new leaf.’
      reform, improve, amend
      mend one's ways, become a better person, change completely, make a fresh start, change for the better, reconstruct oneself
      go straight, get back on the straight and narrow
      View synonyms

Origin

Old English lēaf, of Germanic origin; related to Dutch loof and German Laub.

Pronunciation:

leaf

/lēf/