1) A very light aircraft, also called sailplane without engine thrust. It needs to be lifted up by a small prop aircraft. Once it is at a sufficent altitude, the cable used for lifting up is detached from its nose and the glider flies freely. In order to maintain its altitude, glider pilots use to catch the so called lifting or ascending windstreams, usually generated by hot air moving up to clouds, and mountainous landscapes.

2)Usually told about an aircraft who has lost any thrust because of engine failure or running out of fuel.

A term used to reference cannabis/marijuana/weed.

A gay male waiter at any restaurant.

A glider is a woman with a loose and very well lubricated vaginal region allowing a gliding effect upon entry of the male penis.

To be a true glider however, some may argue that the woman must be fully aroused for the optimum gliding effect though some have reported an effortless glide on un aroused and often sedated females.

A mechanical League of Legends ADC prodigy on the EUW server.
When an insane play is made it is usually referred to as a "Glider".