轰鸣 Traditional form: 轟鳴 Pinyin (reading): hōngmíng Definitions: boom (sound of explosion) rumble Characters: 轰 - rumble, explosion, blast 鸣 - a bird call or animal cry; to make a sound Traditional characters: 轟 - rumble, explosion, blast 鳴 - a bird call or animal cry; to make a sound