1. A power-transmission device that allows the drive shaft of a motor vehicle to continue turning when its speed is greater than that of the engine shaft.

2. A clutch in the rear-wheel hub of a bicycle that permits the wheel to turn without pedal action, as in coasting.

1. To continue turning or spinning after disengagement from the drive mechanism.

2. To live or move freely and sometimes aimlessly or irresponsibly.

3. To operate independently or free of restraints.