WordWeb Online

1. Continuous full and low-pitched throbbing sound
   "the rumbling rolling sound of thunder"
   - grumbling

1. A loud low dull continuous noise
   "they heard the rumbling of thunder"
   - rumble, grumble, grumbling

1. Make a low noise
   "rumbling thunder"
   - grumble
    
2. To utter or emit low dull rumbling sounds
   - grumble, growl
    
3. [Brit] Uncover a deceit or secret activity
   "our scam was rumbled"

Derived forms: rumblings

See also: full

Type of: emit, go, let loose, let out, noise, sound, utter

Encyclopedia: Rumble