A person or object having the power of judging and determining, or ordaining, without control; one whose power of deciding and governing is not limited.
A person appointed, or chosen, by parties to determine a controversy between them; an arbitrator.
A component in circuitry that allocates scarce resources.
To act as arbiter.
An agent of the person giving him/her the power of attorney (for a specific purpose or for general purposes) to act on his or her behalf. The attorney-in-fact’s power and responsibilities depend on the specific powers granted in the power of attorney document.