A Neutral

1. A nonaligned state, or a member of such a state.
2. A person who takes no side in a dispute.
3. An individual or entity serving as an arbitrator or adjudicator.
4. A neutral hue.
5. The position of a set of gears in which power cannot be transmitted to the drive mechanism.
6. An electrical terminal or conductor which has zero or close to zero voltage with respect to the ground.