heavier-than-air

[ hev-ee-er-thuh n-air ]
/ ˈhɛv i ər ðənˈɛər /
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adjective

(of an aircraft) weighing more than the air that it displaces, hence having to obtain lift by aerodynamic means.

Origin of heavier-than-air

First recorded in 1900–05
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for heavier-than-air

British Dictionary definitions for heavier-than-air

heavier-than-air

adjective

having a density greater than that of air
of or relating to an aircraft that does not depend on buoyancy for support but gains lift from aerodynamic forces

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