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Definition of qui vive noun from the Oxford Advanced Learner's Dictionary

qui vive

noun
 
/ˌkiː ˈviːv/
 
/ˌkiː ˈviːv/
Word Originlate 16th cent.: from French, literally ‘(long) live who?’, i.e. ‘on whose side are you?’, used as a sentry's challenge.
Idioms
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Idioms
on the qui vive
  1. paying close attention to a situation, in case something happens
    • He's always on the qui vive for a business opportunity.
trait
noun
 
 
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