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noun American English pronunciation: leaf /lif/ 
Word Forms
  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

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

    The maple trees were just coming into leaf.

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

    The trees were already in 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


hostile architecture

the design of buildings or public spaces in a way which discourages people from touching, climbing or sitting on them …

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boots on the ground

a situation in which a country's armed forces are physically present in an area of conflict …

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