Short tube attached to the muzzle of a gun that deadens the sound of firing WordNet 3.0 & Open English WordNet

A silencer, also known as a sound suppressor, suppressor, or sound moderator, is a muzzle device that suppresses the blast created when a gun is discharged, therefore reducing the acoustic intensity of the muzzle report and jump, by modulating the speed and pressure of the propellant gas released from the muzzle. Wikipedia

A muzzle device that reduces acoustic intensity Wikipedia Disambiguation

A device attached to or part of the barrel of a firearm which reduces the amount of noise and flash generated by firing the weapon Wikipedia Disambiguation

An American neologism for a silencer Wikipedia Disambiguation

Device which reduces sound intensity or muzzle flash on a firearm Wikidata

A device which suppresses something, especially an electronic or mechanical device. Wiktionary