Quick definitions from WordNet (lighter-than-air)
▸ adjective: relating to a balloon or other aircraft that flies because it weighs less than the air it displaces
▸ Words similar to lighter-than-air
▸ Usage examples for lighter-than-air
▸ Popular nouns described by lighter-than-air
▸ Words that often appear near lighter-than-air
▸ Rhymes of lighter-than-air
▸ Invented words related to lighter-than-air
▸ adjective: relating to a balloon or other aircraft that flies because it weighs less than the air it displaces
▸ Words similar to lighter-than-air
▸ Usage examples for lighter-than-air
▸ Popular nouns described by lighter-than-air
▸ Words that often appear near lighter-than-air
▸ Rhymes of lighter-than-air
▸ Invented words related to lighter-than-air