[lahy-ter-th uh n-air]
- (of an aircraft) weighing less than the air it displaces, hence obtaining lift from aerostatic buoyancy.
- of or relating to lighter-than-air craft.
Origin of lighter-than-air
First recorded in 1900–05
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for lighter-than-air
This defect was overcome by the use of lighter-than-air gas.America's Munitions 1917-1918
His progress had been theirs in the new science of lighter-than-air engineering.Zeppelin
At that point came the true division between heavier-than-air and lighter-than-air machines.The Boy's Book of New Inventions
Harry E. Maule
Dominick, however, wished more than I did to see his lighter-than-air craft in all its glory.Life's Minor Collisions
Balloons, the most elementary form of lighter-than-air air-craft, unprovided with any means of propulsion or steering.