A balloon made buoyant by the heat of a fire burning at its mouth.
Example sentencesExamples
For any type of experimental fire balloon, it is not a good idea to rely too much on an outside heat source.
The ‘Grand Edinburgh Fire Balloon’, which he invented, created a great deal of excitement in 1784 and ultimately resulted in Britain's first manned aerial ascent.
The original Fire Balloon, or Sky Lantern, was apparently invented in China.