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
    • ‘Shoots of M. micrantha were separated into stems, leaves, and reproductive organs.’
    • ‘It makes a decorative house or garden plant with long green leaves and a spectacular flower.’
    • ‘The egg-sacs are deposited in twisted leaves or may be directly attached to a leaf.’
    • ‘The stems and large leaves on the stalk combine almost musically to enhance the richness of the composition.’
    • ‘About two hours later, the yard had almost become a pond, with the green leaves of the plants shining in the rain.’
    • ‘First check the field for the presence or absence of spider mites on individual green leaves on a corn plant.’
    • ‘Only the tender green leaves growing off the stems are really palatable, so this type of cress requires a bit of prep work.’
    • ‘Then the other way is called transpiration, or water lost primarily from the leaves and stems of the plants.’
    • ‘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.’
    • ‘There were plants with long green leaves in every corner and the curtains were of gold silk.’
    • ‘But coca is a very resilient plant, and fresh green leaves are already sprouting from stalks fumigated a few months ago.’
    • ‘Both have stems, leaves, and reproductive structures, but they look very different.’
    • ‘Plants were analysed by measuring the excised leaves of the main shoot.’
    • ‘I want to put white lights around their trunks and red lights along the main stem of the leaves.’
    • ‘There is no green, but leaves of the plants around that area are yellow.’
    • ‘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 has three curved green leaves on each stem, with a large purple blossom in the middle.’
    • ‘Roselle is a woody annual, with green leaves on stems which are usually red.’
    • ‘Individual plant shoots from each category were separated into stem, leaves, and crown.’
    1. 1.1 Any of a number of plant structures similar to leaves, e.g., bracts, sepals, and petals.
    2. 1.2 Foliage regarded collectively.
      • ‘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.’
      • ‘To provide a backdrop to this foliage-ruled leafscape, use climbers to link together canopies of leaf.’
      • ‘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.’
    3. 1.3 The state of having leaves.
      ‘the trees are still in leaf’
      • ‘It could be that the oak tree will be a clue when it's in leaf.’
      • ‘Lilies are better planted in the autumn as they come into leaf very early in the spring.’
      • ‘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.’
      • ‘Groups of bulbs such as daffodils that have become overcrowded and have stopped flowering can be dug up and split whilst in leaf.’
      • ‘It is one of the first trees in the arboretum to come into leaf and flowers prolifically with large creamy/pink blossoms in spring.’
      • ‘Many said they believe that it's unnecessary to drastically prune trees in the summer just as they come into leaf.’
      • ‘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.’
      • ‘Trees on the opposite bank were bursting into leaf, although the sun was defiantly not shining.’
      • ‘Lift, divide and spread out winter aconites while still in leaf.’
      • ‘This, I notice, has come into leaf which could be an indication that roots have formed.’
      • ‘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.’
      • ‘In fact every tree and shrub in the garden is in bud at least, and some are coming into leaf.’
      • ‘And our interest does not stop when the saplings go into leaf.’
      • ‘He wanted to see the trees in his garden coming into leaf.’
      • ‘Outside now that the trees planted last year have started coming into leaf the area is taking on a plaza look.’
      • ‘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 is early spring, since the trees are just coming into leaf, and the low grass is still yellowish.’
      • ‘The oak tree is being more cautious, of course, and will wait a while yet before venturing into leaf.’
      • ‘The bare branches of deciduous trees don't muffle noises like they do when they're in leaf.’
      • ‘Normally elder would come into leaf in late February or March, and into blossom in late April or May.’
    4. 1.4 The leaves of tobacco or tea.
      [as modifier] ‘leaf tea’
      • ‘In other words, tobacco used to be a herbal medicine but public experimentation led to the smoking of the tobacco leaf.’
      • ‘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.’
      • ‘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.’
      • ‘The tiny tobacconist shop was dark and reeked pleasantly of exotic leaf.’
      • ‘But if you have a place in your town that sells loose leaf teas, you really need to head down that path.’
      • ‘So I got some tobacco leaf, mixed it with water and gave it to the baby.’
      • ‘This type of smokeless tobacco comes in loose leaf, plugs or twists.’
      • ‘Without playing the ‘Elitist Snob’ card too severely, let me just say this: Buy loose leaf tea.’
      • ‘Our tea sales have continued to grow, even our loose leaf tea.’
      • ‘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.’
      • ‘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.’
      • ‘Tobacco, or some stronger leaf, smoulders in the ashtray.’
      • ‘Eighty rupees a kilo for long leaf tea was an unquestionable bargain.’
      • ‘The houseboy brings in raspberry leaf tea, and we talk about everything from sex to finances to communication.’
      • ‘They are whole leaf, natural teas.’
      • ‘The price of tobacco was high, the purchaser getting enough leaf to balance the silver coins placed on the other pan of the scales.’
      • ‘I took the raspberry leaf tea with milk from Neville's nanny, but no sugar as it made me restless.’
      • ‘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 look like a giant teabag with the leaves missing: a mass of stretchy, white tissue with thousands of perforations.’
      • ‘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?’
  • 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. 2.1 A single thickness of paper, especially in a book with each side forming a page.
      • ‘A leaf of paper tumbled out, folded into a tight square.’
      • ‘She pulled it out of her book case and turned the leaves to the page around October of that year.’
      • ‘They wrote down all their ideas on a fresh leaf of white lined paper and soon filled up both sides of it.’
      • ‘There stood my ‘sister’, and a small box containing a single leaf of paper.’
      • ‘Against a delicate leaf of paper, the sound of a rapidograph is as raw as the line it produces.’
      • ‘With stifled sobs, she unfolded the single leaf of paper from within and began to read the rigid, soldier-like writing.’
      • ‘I took out the loose leaf of paper that had my Kitten drawing on it.’
      • ‘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.’
      • ‘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.’
      • ‘It prints off a leaf of paper and spits it at the man in the lab coat.’
      • ‘‘That is an incredible price and it is about 10 times more than any Beethoven sketch leaf has ever gone for,’ he said.’
      • ‘Anne replied on another leaf: ‘By daily proof you shall me find / To be to you both loving and kind.’’
      • ‘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.’
      • ‘Thus, at an etymological level, leaves and paper, and leaves and books are deeply connected.’
      • ‘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.’
      page, sheet, folio, flyleaf
      View synonyms
    2. 2.2[with modifier] Gold, silver, or other specified metal in the form of very thin foil.
      • ‘On top of this sheet, smooth down a sheet of metal leaf.’
      • ‘The delicate delineations of each square of metal leaf create subtle patterns.’
      • ‘Twelve pence worth of leaf gold was an expensive amount.’
      • ‘Knapp decorated the sliding hatch in the dining room with gold, silver, and copper leaf on enamel, replacing an earlier plain copper sheet.’
      • ‘Gold leaf used in gilding is made in much the same way.’
      • ‘Gold leaf was then used to enrich the surfaces of paintings, sculptures, buildings, pottery and manuscripts.’
      • ‘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.’
      • ‘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 was applied to the background and his tunic, and perhaps the wreath in his hair, after the panel was placed on the mummy.’
      • ‘In the early 1970s very thin leaf gold was skillfully implanted on rhodochrosite to make spectacular faked specimens.’
      • ‘Malleable, silver may be beaten into a leaf 0.00025 millimeters thin.’
      • ‘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 frames are also a standard for the company.’
      • ‘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.’
      • ‘Tiny bits of metal leaf come together like a textured, variegated sheet on craft projects.’
      • ‘The stacks were then hammered until the gold had spread sufficiently to make a thin foil or leaf.’
      • ‘Sometimes metallic coatings are applied, e.g. in the form of leaf silver.’
      • ‘Gold leaf has been applied to the clock's numerals.’
    3. 2.3 The hinged part or flap of a door, shutter, or table.
      • ‘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.’
      • ‘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.’
      • ‘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. 2.4 An 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. 2.5 The inner or outer part of a cavity wall or double-glazed window.
      • ‘In consequence, the tiling could not be nailed at every course and relied solely on the mortar bedding to the outer leaf of brickwork.’
      • ‘Remove the outer brick leaf to damp proof course level and rebuild the walling, ensuring the wall ties are inserted in the correct positions.’
    6. 2.6 Any 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.

    • ‘Ash trees were leafing up, the hedges were thick.’
    • ‘Once it leafs out it is a wonderful privacy screen.’
    • ‘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.’
    • ‘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.’
    • ‘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.’
    • ‘You can transplant existing shrubs and perennial plants before they begin to leaf out.’
    • ‘Most trees are leafing out already; some have made significant progress.’
    • ‘But if you prune back hard or after the tree leafs out in spring, it may be slower to come into bloom that year.’
    • ‘You can transplant in the spring up until the plants leaf out.’
    • ‘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.’
    put out leaves, bud, burst into leaves
    View synonyms
  • 2leaf throughTurn over (the pages of a book or the papers in a pile), reading them quickly or casually.

    ‘he leafed through the stack of notes’
    • ‘I've only leafed through a copy, and read the first chapter.’
    • ‘Stretched out next to the sofa was Julie, leafing lazily through a magazine.’
    • ‘He approached it on tip toes, leafing through a pile of papers on the surface.’
    • ‘Picking one at random, he leafed idly through it as he let his mind work.’
    • ‘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.’
    • ‘Either study abroad or leaf through the books of some great photographers in the world.’
    • ‘But anyway, she pulled out my folder and began leafing through the papers inside.’
    • ‘I leafed through the stack in my hand.’
    • ‘He leafed through a stack of letters, splitting them into bills and correspondence.’
    • ‘You can turn the pages as though leafing through the book.’
    • ‘I noticed that he was leafing through some folders on his desk, and I was struck by a question.’
    • ‘As she leafs through the yellow pages, my eyes try in vain to grab a word or two from the looped, fastidious handwriting.’
    • ‘How about having a cup of freshly brewed coffee while leafing through pages of an interesting book?’
    • ‘I let him leaf through the first few pages before I spoke up again.’
    • ‘I sat on the cot and leafed through a magazine, shivering silently.’
    • ‘"All right then, " said the magistrate, leafing through some papers.’
    • ‘I reached for a poetry book and sat quietly for a while, leafing through the pages.’
    • ‘He was leafing through folders of paper, taking notes on a large yellow pad.’
    • ‘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.’
    • ‘So I did what Pa asked, and leafed through the book, its pages heavy and dusty, well-inscribed and made to last for centuries.’
    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, and she told me to ring the police.’
      • ‘I was shaking like a leaf on the first tee, as nervous standing over the ball as I had ever been in my life.’
      • ‘I was really shaking like a leaf when we first showed it.’
      • ‘She breathes heavily and, although trembling like a leaf from the shock, she succeeds in untying herself.’
      • ‘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.’
      • ‘‘I mean, I was shaking like a leaf,’ she confesses.’
      • ‘Just thinking about it makes me shake like a leaf.’
      • ‘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.’
      • ‘Absolutely terrified and trembling like a leaf, I sat down and played for him.’
  • 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.

      • ‘The stores are never empty and the oligarchs have turned over a new leaf.’
      • ‘Is he turning over a new leaf?’
      • ‘I had these, but now I'm going to turn over a new leaf and that's all there is.’
      • ‘A reprieved Dr Rob turns over a new leaf, and places an illustrated lonely hearts ad.’
      • ‘Apparently the boy has turned over a new leaf.’
      • ‘He appears to have turned over a new leaf - though how long it lasts remains to be seen.’
      • ‘He is pleased to have finally turned over a new leaf and is looking forward to a bright future.’
      • ‘He seems to have genuinely turned over a new leaf.’
      • ‘It's the time of year for turning over a new leaf and resolving to be a New You.’
      • ‘Avery's response is to turn 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/