Press An airship is any powered, steerable aircraft that it is inflated with a gas that is lighter than air.
“Airship” and “dirigible” are synonyms; a dirigible is any lighter-than-air craft that is powered and steerable, as opposed to free floating like a balloon.
A blimp (technically a “pressure airship”) is a powered, steerable, lighter-than-air vehicle whose shape is maintained by the pressure of the gases within its envelope.
Source: Airships, Dirigibles, Zeppelins, & Blimps:What’s the Difference? | Airships.net
