[{"Bold_text": "verb (used without object)", "List Items": ["to make a deep, heavy, somewhat muffled, continuous sound, as thunder.Synonyms: boom , roll , thunder , roar", "to move or travel with such a sound:The train rumbled on.", "Slang.to have or take part in a street fight between or among teenage gangs:Rival gangs rumbled on Saturday afternoon."]}, {"Bold_text": "verb (used with object)", "List Items": ["to give forth or utter with a rumbling sound:to rumble a command.", "to cause to make or move with a rumbling sound:to rumble a wagon over the ground.", "to subject to the action of a rumble or tumbling box tumbling box,as for the purpose of polishing."]}, {"Bold_text": "noun", "List Items": ["a deep, heavy, somewhat muffled, continuous sound:the rumble of tanks across a bridge.", "rumble seat rumble seat.", "a rear part of a carriage containing seating accommodations, as for servants, or space for baggage.", "a tumbling box.", "Slang.a street fight between rival teenage gangs."]}]