n. - One that silences;
n. - The muffler of an internal-combustion engine.
n. - Any of various devices to silence the humming noise of telegraph wires.
n. - 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.