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English definition of “rock”

rock

noun     /rɒk/
SUBSTANCE [U] B1 the hard, natural substance that forms part of the Earth's surface : a layer of volcanic rockGeology - general words
LARGE PIECE [C] B1 a large piece of rock or stone : Huge waves were crashing against the rocks.Types of rockPrecious and semi-precious stones
MUSIC [U] A2 loud , modern music with a strong beat , often played with electric guitars and drums : hard/ soft rock rock music a rock band / singer Pop, rock and soulTypes of music
(Definition of rock noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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