roar Meaning in the Cambridge English Dictionary
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Meaning of “roar” in the English Dictionary

"roar" in British English

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roarverb

uk   /rɔːr/  us   /rɔːr/
C2 [I] to make a ​long, ​loud, ​deepsound: 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 ​theirmotorbikes.C2 [T] to ​shoutloudly: [+ speech] "Stop that!" he roared.
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Phrasal verbs

roarnoun [C or S]

uk   /rɔːr/  us   /rɔːr/
C2 a ​loud, ​deepsound: The ​lion let out a ​loud roar. His ​apartment was on a ​mainroad and there was aconstant roar of ​traffic.
(Definition of roar from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"roar" in American English

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roarverb [I]

 us   /rɔr, roʊr/
to make a ​long, ​loud, ​deepsound: Lions were roaring in ​theircages. The ​crowd roared with ​laughter. If a ​vehicle roars ​somewhere, it moves there ​quickly making a lot of ​noise: His ​truck roared down the ​steepmountain.
roar
noun [C/U]  us   /rɔr, roʊr/
[U] Living near the ​highway, we ​hear the ​constant roar of ​traffic.
(Definition of roar from the Cambridge Academic Content Dictionary © Cambridge University Press)
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