Definition of in leaf
: bearing new leaves By the end of April, most trees are in leaf.
Word by Word Definitions
: 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
Seen and Heard
What made you want to look up in leaf? Please tell us where you read or heard it (including the quote, if possible).