/ Dictionary / Index M muffler: Meaning and Definition of Find definitions for: muf•fler Pronunciation: (muf'lur), [key] — n. a scarf worn around one's neck for warmth. any of various devices for deadening sound, as the sound of escaping gases of an internal-combustion engine. anything used for muffling. a mittenlike glove worn with a mail hauberk. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: muffler (Thesaurus) muffle color mufti Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language