1) Fly a plane without an engine 2) Glider 3) Glider of a sort 4) To fly in a sailplane 1) Glider 
An unpowered, soaring aircraft capable of maintaining level flight for long periods of time after release from tow and of gaining altitude using wind currents, as opposed to a GLIDER.
(from the article `airplane`) ...are usually used for flight training and have the capability to fly reasonable distances when they are catapulted or towed into the air (see ... ...of a slingshot, or by winch tow, which works like a giant fishing reel, with the glider attached to one end like a fish. While hang gliders ... ...and con...
See glider
[v] - fly a plane without an engine
An unpowered fixed-wing heavier-than-air craft. (Also glider)
A high performance glider capable of soaring flight.
An unpowered, soaring aircraft capable of maintaining level flight for long periods of time after release from tow and of gaining altitude using wind currents, as opposed to a GLIDER.