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leaf

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noun leaf pronunciation in British English /liːf/ 
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singularleaf
pluralleaves
  1. 1
    [countable] a flat thin green part of a tree or plant that grows on a branch or stem

    A light breeze stirred the leaves of the tall oak tree outside her window.

    falling/autumn leaves

    be in leaf (=have produced leaves in spring):

    The trees were already in leaf.

    come into leaf (=start to produce leaves in spring):

    The hedgerows were just coming into leaf.

    Synonyms and related words for this sense of leaf
    Synonyms and related words for this sense of leaf
  2. 2
    [countable] a sheet of paper, especially in a book
    leaf of:

    a leaf of paper

    one of the leaves of a book

    Synonyms and related words for this sense of leaf
  3. 3
    [countable] a part of a table that you can swing up into position or add to the table to make it bigger
    Synonyms and related words for this sense of leaf
  4. See also  gold leaf

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