"thundering" in the verb sense
1. thunder
move fast, noisily, and heavily
"The bus thundered down the road"
2. thunder, roar
utter words loudly and forcefully
"`Get out of here,' he roared"
3. thunder, boom
be the case that thunder is being heard
"Whenever it thunders, my dog crawls under the bed"
4. thunder
to make or produce a loud noise
"The river thundered below"
"The engine roared as the driver pushed the car to full throttle"
"thundering" in the adjective sense
1. thundering
sounding like thunder
"the thundering herd"
2. thundering
extraordinarily big or impressive
"a thundering success"
"the thundering silence of what was left unsaid"
Source: WordNet® (An amazing lexical database of English)
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