Definitions of agent

  1. an active and efficient cause; capable of producing a certain effect; " their research uncovered new disease agents"
  2. a representative who acts on behalf of other persons or organizations
  3. any agent or representative of a federal agency or bureau
  4. One who exerts power, or has the power to act; an actor.
  5. 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.
  6. 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.
  7. A person authorized to act for and under the direction of another person when dealing with third parties. The person who appoints an agent is called the principal. An agent can enter into binding agreements on the principal's behalf and may even create liability for the principal if the agent causes harm while carrying out his or her duties. See also attorney- in- fact.
  8. One who acts, especially for another; an active power or cause.
  9. A person or thing that acts or exerts power: one intrusted with the business of another.
  10. A person or thing that acts; one who acts for another.
  11. One who acts; actor; doer.
  12. One who or that which acts for another; a deputy.
  13. An actor; a person or thing that acts, or produces an effect; the means whereby anything is effected; a factor; one who acts for another.
  14. The person or thing that exerts power; one intrusted with the business of another.
  15. Acting; - opposed to patient, or sustaining, action.
  16. Acting.