ˌfour-leaf ˈclover (
also ˌfour-leaved ˈclover British English)
noun [countable] a
clover plant that has four leaves instead of the usual three, and is considered to be lucky
[TahlilGaran] Dictionary of Contemporary English ▲
four leaf clover n. A small green plant with four leaves which many people think means good luck because clover plants usually have three leaves.
John has a four-leaf clover in his pocket. He thinks he will have good luck now. [TahlilGaran] English Idioms Dictionary ▲