- a transparent dome, usually made of plastic or bulletproof glass, that serves as the roof or part of the roof of an automotive vehicle.
- a vehicle having such a dome: The old van was converted into a bubbletop.
- fitted with such a dome: a bubbletop limousine.
Origin of bubbletop
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018