/ Dictionary / Index M mutter: Meaning and Definition of Find definitions for: mut•ter Pronunciation: (mut'ur), [key] — v.i. to utter words indistinctly or in a low tone, often as if talking to oneself; murmur. to complain murmuringly; grumble. to make a low, rumbling sound. —v.t. to utter indistinctly or in a low tone: to mutter complaints. —n. the act or utterance of a person who mutters. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mutter (Thesaurus) Mutt and Jeff mutton Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language