heavier than air
/ˈhɛviər ðən ˈɛr/
adjective
- Describing an aircraft that is heavier than the air it displaces and stays aloft by aerodynamic lift, such as airplanes and helicopters.
- Most modern aircraft are heavier-than-air, unlike balloons or blimps.
- Heavier-than-air flight requires engines or propellers to generate lift.
- The Wright brothers invented the first successful heavier-than-air flying machine.
Antonyms