ALL meanings of lighter-than-air
light·er-than-air
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 that is lighter than air, describing materials or aircraft. 0