leaf
n. countable B1 Intermediate Oxford US //ˈɫif// UK //lˈiːf// leaf
n. the flat, green part of a plant that grows from a stem or branch. You see many of these on trees and they often change color in the fall.
n. the principal lateral appendage of the vascular plant stem, usually specialized for photosynthesis. It is typically a thin, flat, green structure.
The autumn leaf fell slowly from the tree.
During the spring, the oak tree produces a fresh green leaf on every small branch.
Botanists can often identify a tree species simply by examining the shape and vein pattern of a single leaf collected from the forest floor.
Usage
The plural form is 'leaves'.
Pitfall
The tree has many leafs.The tree has many leaves.The plural of leaf is irregular and requires changing the 'f' to 'v' before adding 'es'.