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English definition of “instant”

instant

noun [S]     /ˈɪn.stənt/
an extremely short period of time: In an instant her mood had changed. The startled boy froze for an instant, then fled. "Stop that noise this instant (= now)!" I'll call you the instant (= as soon as) I get home. → Synonym momentShort in timeTemporary
(Definition of instant noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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