agent

American  

[ey-juhnt] / ˈeɪ dʒənt /

noun

1. a person or business authorized to act on another's behalf.

   Our agent in Hong Kong will ship the merchandise.

   A best-selling author needs a good agent.

   Synonyms:

   deputy, representative

2. a person or thing that acts or has the power to act.

3. a natural force or object producing or used for obtaining specific results.

   Many insects are agents of fertilization.

   Synonyms:

   means

4. an active cause; an efficient cause.

5. a person who works for or manages an agency.

6. a person who acts in an official capacity for a government or private agency as a guard, detective, or spy.

   an FBI agent;

   the secret agents of a foreign power.

7. a person responsible for a particular action.

   Who was the agent of this deed?

8. Grammar. a form or construction, usually a noun or noun phrase, denoting an animate being that performs or causes the action expressed by the verb, as the police in The car was found by the police.

9. Indian agent.

10. a representative of a business firm, especially a traveling salesperson; canvasser; solicitor.

11. Chemistry. a substance that causes a reaction.

12. Pharmacology. a drug or chemical capable of eliciting a biological response.

13. Pathology. any microorganism capable of causing disease.

14. British. a campaign manager; an election agent.

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adjective

1. acting; exerting power (patient ).

verb (used with object)

1. to represent (a person or thing) as an agent; act as an agent for: Who agented that deal?

   to agent a manuscript;

   Who agented that deal?

agent British  

/ ˈeɪdʒənt, eɪˈdʒɛnʃəl /

noun

1. a person who acts on behalf of another person, group, business, government, etc; representative

2. a person or thing that acts or has the power to act

3. a phenomenon, substance, or organism that exerts some force or effect

   a chemical agent

4. the means by which something occurs or is achieved; instrument

   wind is an agent of plant pollination

5. a person representing a business concern, esp a travelling salesman

6. short for estate agent

7. short for secret agent

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agent Scientific  

/ ā′jənt /

1. A substance that can bring about a chemical reaction or a biological effect.

2. Compare reagent

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Other Word Forms

• agential adjective
• counteragent noun
• interagent noun
• superagent noun
• underagent noun

Etymology

Origin of agent

First recorded in 1570–80; from Latin agent-, stem of agēns “doing,” present participle of agere “to do, drive”

Explanation

When you're buying a house or negotiating your break-out movie contract, it's a good idea to hire an agent to represent you — someone who can keep a cool head and get the best deal for you. The suave 007 may be your dream secret agent, but you could find real ones in the CIA, the FBI, and other government organizations populated with agents. Beware the double agent, the spy you think is working for you when he's really working for your enemy. An inanimate object can also be an agent. A chemical agent, like vinegar mixed with salt, can make copper pennies shine. Chemical weapons contain more sinister agents that wreak havoc on their victims.

Example Sentences

The hallmark of the “Khongian” multiverse, according to her agent, Marya Spence, are the boundless souls contained within her characters’ ordinary bodies.

From Los Angeles Times • Apr. 13, 2026

Wendy Whitmore, of cybersecurity firm Palo Alto Networks, expects "some sort of catastrophic attack" this year connected to AI agent capabilities.

From Barron's • Apr. 10, 2026

"It's senseless. It's a video you can never unwatch," Micah McCombs, special agent in charge with Homeland Security Investigations, said during a news conference on Friday.

From BBC • Apr. 10, 2026

The Sparks don’t have a first-round draft pick, so they will need to pursue talent on the robust free agent market or make another trade to bolster their backcourt.

From Los Angeles Times • Apr. 10, 2026

She holds up a small cube, smiling like it’s some wonder bonding agent on an infomercial.

From "The Last Cuentista" by Donna Barba Higuera

Related Words

• assistant
• broker
• commissioner
• deputy
• handler
• lawyer
• minister
• officer
• operative
• operator
• promoter
• representative
• worker