A device for silencing the report of a firearm shooting its projectiles singly, as a tubular attachment for the muzzle having circular plates that permit the passage of the projectile but impart a rotary motion to, and thus retard, the exploding gases
a tubular acoustic device inserted in the exhaust system that is designed to reduce noise short tube attached to the muzzle of a gun that deadens the sound of firing
A virtually prohibited device for attachment to a gun's muzzle for reducing (not silencing) the report Better terms would be "sound suppressor" or "sound moderator "
{i} person or thing that silences; device attached to the barrel of a gun to muffle the sound of gunfire; muffler of an internal combustion engine (British)