qui vive

Noun

qui vive (uncountable)

1. a state of heightened vigilance, especially prior to battle
   • "QUI vive!" The sentry's musket rings,
     The channelled bayonet gleams;
     High o'er him, like a raven's wings
     The broad tri-colored banner flings
     "QUI vive!" The sentry's musket rings,. The channelled bayonet #:gleams; ... "Qui vive!" How oft the midnight air. That startling cry has borne! ...1836, Oliver Wendell Holmes, Qui Vive
   • Qui vive? Who passes by up there?
     Who moves -- what stirs in the startled air?
     What whispers, thrills, exults up there?
     Qui vive?1917, Grace Ellery Channing, The Flags of France