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out

adverb, preposition (LOUD)
 
 
/aʊt/

Definition

used with verbs describing sounds to emphasize the loudness of the sound: He cried out in pain as he hit his head. Charlie Chaplin films always make me laugh out loud.Noise and noisy
(Definition of out adverbpreposition (LOUD) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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