- to murmur or mutter in discontent; complain sullenly: Tim always found something to grumble about.
- to utter low, indistinct sounds; growl: Suddenly I heard my stomach grumble, and realized I hadn't had any lunch.
- to rumble: The thunder grumbled in the west.
- to express or utter with murmuring or complaining.
- an expression of discontent; complaint; unhappy murmur; growl.
- a grumbling, discontented mood.
- a rumble.
- to utter (complaints) in a nagging or discontented way
- to make low dull rumbling sounds
- a complaint; grouse
- a low rumbling sound
