[WJW]

Except for rockets, everything in the air is gliding. Some things are also powered, but that does not makes them glide less, just more.

[starpilot]

In aviation, by definition gliding is unpowered flight, like coasting in a car. If you're doing performance calculations, there are different equations for gliding and powered flight.

[ajuc]

Ballons aren't gliding.

Helicopters and quadcopters also aren't gliding.

[WJW]

Helicopters and quadcopters provide lift through rotary wings, thereby gliding. Fair point about balloons though.

[ajuc]

That's like saying cars are moving by turning (because their wheels do that).

[meheleventyone]

Cars are moved by turning though. From the pistons driving the engine, through the gearbox and drivetrain to the wheels.