Definition of in leaf
- By the end of April, most trees are in leaf.
: a lateral (see 1lateral 2) outgrowth from a plant stem that is typically a flattened expanded variably shaped greenish organ, constitutes a unit of the foliage, and functions primarily in food manufacture by photosynthesis
: to shoot out or produce leaves
: to turn over pages especially to browse or skim
: to turn over the pages of
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