lighter-than-air

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Definitions from WordNet

Adjective lighter-than-air has 1 sense

lighter-than-air - relating to a balloon or other aircraft that flies because it weighs less than the air it displaces
Antonym: heavy (indirect, via light)

Definitions from the Web

Term: lighter-than-air

Part of Speech: Adjective

Sense: Pertaining to objects or substances that have a density less than that of air

Sample sentence: The scientific experiment involved studying the behaviour of lighter-than-air gases.

Sense: Related to or describing aircraft that rely on buoyancy to stay aloft

Sample sentence: The Hindenburg was a famous example of a lighter-than-air airship.

Part of Speech: Noun

Sense: A vehicle, such as a balloon or airship, that is supported in the air by buoyancy

Sample sentence: The children excitedly watched the lighter-than-air floating balloon as it rose into the sky.

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