thundering (Adjective) — Sounding like thunder. ex. "the thundering herd"
thundering (Adjective) — Extraordinarily big or impressive. ex. "a thundering success" ex. "the thundering silence of what was left unsaid"
thundering (Verb) — Move fast, noisily, and heavily. ex. "The bus thundered down the road"
thundering (Verb) — Utter words loudly and forcefully. ex. "'Get out of here,' he thundered"
thundering (Verb) — Be the case that thunder is being heard. ex. "Whenever it thunders, my dog crawls under the bed"
thundering (Verb) — To make or produce a loud noise. ex. "The river thundered below"