What is the meaning of Freewheel?

A device in a transmission that disengages the driveshaft from the driven shaft when the driven shaft rotates faster than the driveshaft.

The mode or state of operation thus produced: Synonym of neutral.

To continue spinning after disengagement.

To ride a bicycle without pedalling, e.g. downhill.

To operate a motor vehicle which is coasting without power, e.g. downhill.

To operate free from constraints.

Source: wiktionary.org