Other forms: leaves, leafs
A leaf is one of the flat green parts of a plant that turn orange in autumn. A fallen leaf, a leaf of the tree, leaf litter.
It is a solar panel: flat to catch light, thin to let gas through, and green because chlorophyll reflects the light it cannot use. The autumn colours were there all summer under the green. A leaf is also a page of a book, and turning over a new leaf means starting afresh.
1nounleafOne of the flat green parts of a plant.
“A single leaf floated down and landed on the water.”
2nounpageA page of a book.
“He carefully turned each leaf of the ancient manuscript.”
leaf is a plant part, or a page.
Also accepted in games: leaves
Old English leaf is a Germanic word for the leaf of a plant or a page. German Laub is the same word.
Middle English
lef
English, today
leaf
Built from
From Middle English lef. From Middle English lef, leef, from Old English lēaf, from Proto-West Germanic laub, from Proto-Germanic laubą (“leaf”), from Proto-Indo-European lowbʰ-o-m, from lewbʰ- (“to cut off”). 2
Etymology from Wiktionary, CC BY-SA