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