Definition of "air raid"

Air raids on London, which first began on an intensive scale on September 7, occasioned a certain amount of disorganisation to transport services of all kinds.

1940 December, “Railways and the War—III”, in Railway Magazine, pages 629–630

The L.N.E.R. locomotive damaged beyond repair in the air raid on York, on April 29, 1942, was No. 4469, Sir Ralph Wedgewood, a class "A 4" Pacific.

1946 November and December, “The Why and The Wherefore: Destruction of Locomotive No. 4469, L.N.E.R.”, in Railway Magazine, page 391

There goes the siren that warns of the air raid / Then comes the sound of the guns sending flak / Out for the scramble we've got to get airborne / Got to get up for the coming attack.

1984, Steve Harris, "Aces High", Iron Maiden, Powerslave.