grumble: Meaning and Definition of

grum•ble

1. to murmur or mutter in discontent; complain sullenly.
2. to utter low, indistinct sounds; growl.
3. to rumble: The thunder grumbled in the west.

1. to express or utter with murmuring or complaining.

1. an expression of discontent; complaint; unhappy murmur; growl.
2. a grumbling, discontented mood.
3. a rumble.