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English definition of “roar”

roar

noun [C or S]     /rɔːr/ US  /rɔːr/
C2 a loud , deep sound : The lion let out a loud roar. His apartment was on a main road and there was a constant roar of traffic .Animal (non-human) soundsSounds made by humans with their mouths
(Definition of roar noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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