WordWeb Online

1. Sounding like thunder
   "the thundering herd"
    
2. Extraordinarily big or impressive
   "a thundering success"; "the thundering silence of what was left unsaid"

1. Move fast, noisily, and heavily
   "The bus thundered down the road"
    
2. Utter words loudly and forcefully
   "'Get out of here,' he thundered"
   - roar
    
3. Be the case that thunder is being heard
   "Whenever it thunders, my dog crawls under the bed"
   - boom
    
4. To make or produce a loud noise
   "The river thundered below"

See also: impressive, noisy, thunderer

Type of: howl, move, roar, shout

Encyclopedia: Thunder Thunder, Lightning, Strike