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Related to heavier-than-air: Heavier-than-air flight
Of, relating to, or being an aircraft heavier than the air it displaces.
1. (General Physics) having a density greater than that of air
2. (Aeronautics) of or relating to an aircraft that does not depend on buoyancy for support but gains lift from aerodynamic forces
(of an aircraft) weighing more than the air it displaces, hence having to obtain lift by aerodynamic means.