Definition 1 of 2
Plain English Meaning
An aircraft with wings but no engine that is towed or launched into the air and then flies by riding rising air currents and gradually descending.
Full Definition
A heavier-than-air aircraft that is supported in flight by the dynamic reaction of the air against its lifting surfaces, and whose free flight does not depend on an engine. Gliders are typically launched by aerotow, ground winch, or auto tow, and sustain or extend flight by using rising air such as thermals, ridge lift, or wave lift.
Context Anchor
Seen in aircraft category discussions, pilot certificate , , launch , and operations.