The definition of a rock is a hard mass of stone, or a broken off piece of a boulder, or is slang for a piece of crack cocaine.(noun)
Rock is defined as moving or swaying from side to side.(verb)
Rock is defined as something related to rock and roll music.(adjective)
An example of rock is music produced by The Beatles.
See rock in Webster's New World College Dictionary
Origin: ME rokke < OFr roche < ML rocca
Origin: ME rocken < OE roccian, prob. akin to Ger rücken, to pull, push < IE *rek-, to project, totter (> ON, MDu rā, sailyard) < base *reg-, to put in order, stretch out > right
See rock in American Heritage Dictionary 4
Origin: Middle English
Origin: , from Old North French roque
Origin: , from Vulgar Latin *rocca.
verb rocked, rock·ing, rocks verb, intransitive
Origin: Middle English rokken
Origin: , from Old English roccian.
Learn more about rock