- (v.i.) To murmur or mutter with discontent; to make ill-natured complaints in a low voice and a surly manner.
- (v.t.) To express or utter with grumbling.
- (v.i.) To rumble; to make a low, harsh, and heavy sound; to mutter; as, the distant thunder grumbles.
- (n.) A grumbling, discontented disposition.
- (v.i.) To growl; to snarl in deep tones; as, a lion grumbling over his prey.
- (n.) The noise of one that grumbles.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). grumble. Retrieved September 23, 2026, from http://smartdefine.org/grumble/definitions/2013954 |
| Chicago | Webster's. 2011. "grumble" http://smartdefine.org/grumble/definitions/2013954 (accessed September 23, 2026). |
| Harvard | Webster's 2011, grumble, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/grumble/definitions/2013954>. |
| MLA | Webster's. "grumble" 27 May 2011. Web. 23 September 2026. <http://smartdefine.org/grumble/definitions/2013954> |