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English definition of “out”

out

noun     /aʊt/
[C usually singular] informal an excuse or reason for avoiding an unpleasant situation: We must arrange the negotiations so we have an out if we need it.Reasons and explanations on the outs US informal People who are on the outs have argued and are not now friendly with each other: Lizzie and Tyler are on the outs again.Not being friendlyNot saying muchBlunt and direct in speech and behaviour
(Definition of out noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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