Airship

n. lighter-than-air aircraft with propulsion and steering systems

An airship or dirigible is a buoyant lighter-than-air aircraft that can be steered and propelled through the air. Unlike aerodynamic vehicles such as fixed-wing aircraft and helicopters which stay aloft by moving an airfoil through the air in order to produce lift, aerostatic craft such as airships and balloons stay aloft by filling a large cavity with lighter than air gas. Most currently in service are blimps, while a few semi-rigid airships with a fixed keel exist. Airships with a full skeleton, such as the massive Zeppelin transoceanic models, are now a thing of the past.
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Noun
1. a steerable self-propelled airship
(synonym) dirigible
(hypernym) lighter-than-air craft
(hyponym) barrage balloon
(part-meronym) car, gondola

(See also Aircraft, Airframe, Airplane) An engine-driven lighter-than-air aircraft that can be steered. (14CFR1)

Synonyms and related words:
Graf Zeppelin, aerostat, ballonet, balloon, basket, blimp, car, catwalk, dirigible, dirigible balloon, envelope, gas chamber, gasbag, gondola, lighter-than-air craft, mooring harness, rigid airship, sandbag, semirigid airship, ship, subcloud car, zeppelin,