Air Alert — definition

1. air alert (Noun)

air alert (Noun) — The time period during which military and civilian agencies are prepared for an enemy air attack.

air alert (Noun) — The condition in which combat aircraft are airborne and ready for an operation. ex. "aircraft in the Mideast are on air alert"

air alert (Noun) — The warning signal that begins a period of preparation for an enemy air attack.

alarm alarum alert period period of time qui vive time period warning signal