a flattened structure of a higher plant, typically green and blade-like, that is attached to a stem directly or via a stalk. Leaves are the main organs of photosynthesis and transpiration

many of the trees had lost their leaves

bay leaves

an oak leaf

a thing that resembles a leaf in being flat and thin

(of a plant, especially a deciduous one in spring) put out new leaves

many plants need a period of dormancy before they leaf and flower

turn over (the pages of a book or the papers in a pile), reading them quickly or casually

he leafed through the stack of notes