A plant of the genus Trifolium with leaves usually divided into three (rarely four) leaflets and with white or red flowers.
"The farmer planted clover in his fields to improve soil fertility while enjoying its bright red flowers."
In plain English: Clover is a small green plant with three leaflets that often grows in grassy fields and lawns.
"The child picked four-leaf clovers from the green grass in the garden."
Usage: The plural form is "clovers," but the word can also be used as a mass noun when referring to clover hay or forage in general. Avoid using it as an adjective; instead, use "clover" only as a noun modifier (e.g., "a clover patch") rather than attributing qualities directly to other nouns.
A surname.
"The Clover family has lived in that small town for three generations."
The word clover comes from Old English clǣfre and traveled into modern English through Middle English forms like clovere. Its original meaning was simply the plant itself, which has remained unchanged over time.