Agent

Webster's Dictionary of the English Language

·adj Acting;

— opposed to patient, or sustaining, action.

II. Agent ·noun One who exerts power, or has the power to act; an Actor.

III. Agent ·noun One who acts for, or in the place of, another, by authority from him; one intrusted with the business of another; a substitute; a deputy; a factor.

IV. Agent ·noun An active power or cause; that which has the power to produce an effect; as, a physical, chemical, or medicinal agent; as, heat is a powerful agent.

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