qui vive

Synonyms:

alert

Types:

air alert

the condition in which combat aircraft are airborne and ready for an operation

red alert

the highest level of alert when an attack by the enemy seems imminent (or more generally a state of alert resulting from imminent danger)

strip alert

a state of readiness for domestic defense aircraft

Type of:

preparation, preparedness, readiness

the state of having been made ready or prepared for use or action (especially military action)