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English definition of “either-or”

either-or

adjective [before noun]     /ˌaɪ.ðərˈɔːr/ /ˌiː-/ US  /-ðɚˈɔːr/
describes a situation in which there is a choice between two different plans of action, but both together are not possible: It's an either-or situation - we can buy a new car this year or we can go on holiday, but we can't do both.Taking and choosingExpressions used to describe situations
(Definition of either-or adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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