can mean:
- Agent (grammar) , one of the thematic roles: the participant of a situation that carries out an action
- Agent (law) , a person authorised to act on behalf of another person
- --- Literary Agent , a person who represents a writer
- --- Sports Agent , a professional who represents an athlete
- Agent (economics)
- Espionage , secret agent, a spy
- Double Agent , in spying
- Election Agent , a person responsible for a candidate's campaign
- Free Agent , a sports player who is out of contract
- Real Estate Broker , or real estate agent
- Agent Provocateur , A person assigned to provoke unrest, violence, debate, or argument by or within a group while acting as a member of the group but covertly representing the interests of another
- Agent Noun (or ''nomen agentis''), one of the derivatemes (a topic from linguistic morphology)
;In science:
;In computing:
;In culture:
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