( often initial capital letter ) a large dirigible balloon consisting of a long, cylindrical, covered framework containing compartments or cells filled with gas, and of various structures for holding the engines, passengers, etc.
Dirigible being the name of the balloon airship as a generic term, back in the day when man in the air, flying was still a novel idea. The German man, Count von Zeppelin took the idea to lengths and ran with it. Producing the greatest of all dirigibles, the Hindenburg.
What a disaster that turned out to be.