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English definition of “window”

window

noun [C] (OPPORTUNITY)    /ˈwɪn.dəʊ/ US  /-doʊ/
a period when there is an opportunity to do something: I'm quite busy this week but there might be a window on Friday. If a window of opportunity (= an opportunity) should present itself, I'd take advantage of it.Opportunity Freedom to act
(Definition of window noun (OPPORTUNITY) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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