Word Study
qui vive
WORDNET DICTIONARY
Noun qui vive has 1 sense
- qui vive(n = noun.state) alert - condition of heightened watchfulness or preparation for action; "bombers were put on alert during the crisis" is a kind of preparation, preparedness, readiness
has particulars: air alert, red alert, strip alert
CIDE DICTIONARY
qui vive, [F., fr. qui who + vive, pres. subj. of vivre to live.].
The challenge of a French sentinel, or patrol; -- used like the English challenge: “Who comes there?” [1913 Webster]
OXFORD DICTIONARY
qui vive, n.
Idiom
on the qui vive on the alert; watching for something to happen.
Etymology
F, = lit. '(long) live who?', i.e. on whose side are you?, as a sentry's challenge
For further exploring for "qui vive" in Webster Dictionary Online