ALL meanings of lighter than air
light·er than A·ïr
L l - adjective lighter than air (of an aircraft) weighing less than the air it displaces, hence obtaining lift from aerostatic buoyancy. 1
- adjective lighter than air of or relating to lighter-than-air craft. 1
- adjective lighter than air having a lower density than that of air 0
- adjective lighter than air of or relating to an aircraft, such as a balloon or airship, that depends on buoyancy for support in the air 0
- adjective lighter than air designating or of an airship or a balloon filled with a gas lighter than air 0