- (v.i.) To utter words indistinctly or with a low voice and lips partly closed; especially, to utter indistinct complaints or angry expressions; to grumble; to growl.
- (n.) Repressed or obscure utterance.
- (v.i.) To sound with a low, rumbling noise.
- (v.t.) To utter with imperfect articulations or with a low voice; as, to mutter threats.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). mutter. Retrieved September 20, 2026, from http://smartdefine.org/mutter/definitions/2035473 |
| Chicago | Webster's. 2011. "mutter" http://smartdefine.org/mutter/definitions/2035473 (accessed September 20, 2026). |
| Harvard | Webster's 2011, mutter, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/mutter/definitions/2035473>. |
| MLA | Webster's. "mutter" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/mutter/definitions/2035473> |