[ lahy-ter-thuhn-air ]
/ ˈlaɪ tər ðənˈɛər /
(of an aircraft) weighing less than the air it displaces, hence obtaining lift from aerostatic buoyancy.
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. 2021
British Dictionary definitions for lighter-than-air
lighter than air
adjective (lighter-than-air when prenominal)
having a lower density than that of air
of or relating to an aircraft, such as a balloon or airship, that depends on buoyancy for support in the air
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012