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English definition of “roar”

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roar

verb uk   /rɔːr/ us    /rɔːr/
C2 [I] to make a long, loud, deep sound: We could hear the lions roaring at the other end of the zoo. [I] If a vehicle or aircraft roars somewhere, it moves there very quickly making a lot of noise: She looked up as a plane roared overhead. The street was full of boys roaring up and down on their motorbikes.C2 [T] to shout loudly: [+ speech] "Stop that!" he roared.
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Phrasal verbs

roar

noun [C or S] uk   /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.
(Definition of roar from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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