1. [syn: air gun, airgun, air rifle]
The Collaborative International Dictionary of English v.0.48:
airgun \air"gun`\, air gun \air" gun`\(g[u^]n`).
A kind of gun in which the elastic force of condensed air is
used to discharge the ball. The air is powerfully compressed
into a reservoir attached to the gun, by a condensing pump,
and is controlled by a valve actuated by the trigger. The
common BB gun is a type of air gun.
WordNet (r) 3.0 (2006):
n 1: a gun that propels a projectile by compressed air [syn:
air gun, airgun, air rifle]