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rock

 
 
/rɒk/ noun

Definition

SUBSTANCE [U] the hard, natural substance which forms part of the Earth's surface: a layer of volcanic rock
LARGE PIECE [C] a large piece of rock or stone: Huge waves were crashing against the rocks.
MUSIC [U] loud, modern music with a strong beat, often played with electric guitars and drums: hard/soft rock rock music a rock band/singer
(Definition of rock noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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