noun
air-raid alarm; air-raid warning
A warning signal or siren indicating an imminent air attack. Used in historical and modern military contexts.
空襲警報が鳴り響いた。
The air-raid alarm sounded.
空襲警報が解除された。
The air-raid warning was lifted.
Compound of 空襲 (air raid) and 警報 (alarm, warning).