originally the rubber suction cup from a plumber's plunger, a mute for brass instruments, which can be held close to the bell to suppress the sound, or moved further away for a more open sound.

Eggcorn of moot point.

plural of mute swan

(phonology) In the French language usage of the letter h at the start of a word which allows liaison with a preceding consonant.

I'm mute

(philately) A postal cancellation that does not state any location or date, used in wartime to prevent the enemy gathering information about troop movements from captured mail.

plural of deaf-mute

plural of mute-hill

(Scotland) Alternative form of moot-hill

plural of mute cancel