add. ·noun one that silences;.
2. silencer ·add. ·noun the muffler of an internal-combustion engine.
3. silencer ·add. ·noun any of various devices to silence the humming noise of telegraph wires.
4. silencer ·add. ·noun 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.