A circular object that revolves on an axle and is fixed below a vehicle or other object to enable it to move easily over the ground. A machine or structure having a wheel as its essential part. A car. A thing resembling a wheel in form or function, in particular a cheese made in the form of a disk. An instance of wheeling; a turn or rotation. Push or pull (a vehicle with wheels). (of a bird or aircraft) fly in a wide circle or curve.