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lighter-than-air

[lahy-ter-thuh n-air]
adjective Aeronautics.
  1. (of an aircraft) weighing less than the air it displaces, hence obtaining lift from aerostatic buoyancy.
  2. of or relating to lighter-than-air craft.
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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

Historical Examples

  • This defect was overcome by the use of lighter-than-air gas.

    America's Munitions 1917-1918

    Benedict Crowell

  • His progress had been theirs in the new science of lighter-than-air engineering.

    Zeppelin

    Harry Vissering

  • At that point came the true division between heavier-than-air and lighter-than-air machines.

  • Dominick, however, wished more than I did to see his lighter-than-air craft in all its glory.

  • Balloons, the most elementary form of lighter-than-air air-craft, unprovided with any means of propulsion or steering.