I. roar 1 /rɔː $ rɔːr/ BrE AmE verb
[ Language: Old English ; Origin: rarian ]
1 . [intransitive] to make a deep, very loud noise ⇨ growl :
We heard a lion roar.
The engines roared.
2 . [intransitive and transitive] to shout something in a deep powerful voice:
‘Get out of my house!’ he roared.
The crowd roared in delight.
3 . [intransitive] to laugh loudly and continuously:
By this time, Michael was roaring with laughter.
4 . [intransitive always + adverb/preposition] if a vehicle roars somewhere, it moves very quickly and noisily:
The car roared off down the road.
roar back phrasal verb
if a competitor or team that was losing roars back, they start performing much better – used in sports reports:
In the second half Leeds came roaring back with two goals in five minutes.
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THESAURUS
▪ shout to say something very loudly:
The two men were shouting angrily at each other.
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‘Wait for me!’ he shouted.
▪ yell ( also holler American English ) to shout very loudly, especially because you are angry, excited, or in pain. Yell is more informal than shout :
The children were yelling at each other across the street.
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‘Steve, are you there?’ Patti hollered up the stairs.
▪ call (out) to shout in order to get someone’s attention:
He called her name but she didn’t hear him.
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‘Is anybody there?’ he called out.
▪ cry (out) written to shout something loudly, especially because you are in pain, frightened, or very excited:
‘I can’t move,’ Lesley cried.
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He cried out in panic.
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‘Look what I’ve found!’ she cried.
▪ scream to shout in a very loud high voice, because you are frightened, unhappy, angry etc:
The baby wouldn’t stop screaming.
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She screamed as she jumped into the cold water.
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‘It’s my money!’ she screamed at him.
▪ roar written to shout in a loud deep voice:
The crowd roared their appreciation.
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‘Stop this nonsense!' he roared.
▪ bellow written to shout in a loud deep voice, especially when you want a lot of people to hear you:
He was bellowing orders at the soldiers.
▪ bawl to shout in a loud and unpleasant way, because you are angry or unhappy:
‘What are you doing?’ he bawled.
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The kids were bawling in the back of the car.
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She was always bawling at the children.
▪ raise your voice to say something more loudly than normal, especially because you are angry:
I never heard my father raise his voice.
▪ cheer if a group of people cheer, they shout as a way of showing their approval:
The crowd cheered when the band came on stage.
II. roar 2 BrE AmE noun [countable]
1 . a deep, loud noise made by an animal such as a lion, or by someone’s voice ⇨ growl :
the roar of the crowd
He let out a roar of laughter.
2 . a continuous loud noise, especially made by a machine or a strong wind:
the roar of the traffic