A hovercraft.

Alternative form of air-cushion vehicle

(painting) in the open air, alfresco, outside, outdoors

(painting) in the open air, alfresco, outside, outdoors

plural of air-cushion vehicle

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