plural of air cushion vehicle

A siren that makes a very loud alarm sound to warn the population of an upcoming air raid.

plural of air-raid warden

(snowboarding) A trick in which the boarder reaches the trailing hand back between the legs and grabs the heel edge of the board between the feet.

plural of surface-to-air missile

plural of air-to-surface missile

(military) A missile that is fired from an aircraft to the ground.

plural of clear-air turbulence

plural of air raid siren

A rank in the Royal Air Force, between that of air commodore and air marshal, equivalent to an army major general.