grumbling meaning and definition

GRUMBLING noun

Definition of grumbling (noun)

1. a loud low dull continuous noise
   • "they heard the rumbling of thunder"
   • synonyms: grumble, rumble, rumbling
2. a complaint uttered in a low and indistinct tone
   • synonyms: grumble, murmur, murmuring, mutter, muttering

GRUMBLING adjective

Definition of grumbling (adjective)

1. continuous full and low-pitched throbbing sound
   • "the rumbling rolling sound of thunder"
   • synonyms: rumbling