| Noun | 1. | heavier-than-air craft - a non-buoyant aircraft that requires a source of power to hold it aloft and to propel itaeroplane, airplane, plane - an aircraft that has a fixed wing and is powered by propellers or jets; "the flight was delayed due to trouble with the airplane" autogiro, autogyro, gyroplane - an aircraft that is supported in flight by unpowered rotating horizontal wings (or blades); forward propulsion is provided by a conventional propeller glider, sailplane - aircraft supported only by the dynamic action of air against its surfaces | |