Pronunciation: (bub'ul-top"),[key] —n. 1. a transparent dome, usually made of plastic or bulletproof glass, that serves as the roof or part of the roof of an automotive vehicle.
2. a vehicle having such a dome: The old van was converted into a bubbletop.
—adj. fitted with such a dome: a bubbletop limousine.Also,bub'ble-top".