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English definition of “agent”

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agent

noun [C]  /ˈeɪ·dʒənt/ us  

agent noun [C] (REPRESENTATIVE)

a person who acts for or represents another: a travel agent He is the agent for several of the highest paid players in baseball. An agent is also someone who works secretly for a government or other organization: a secret agent an undercover agent

agent noun [C] (CAUSE)

a person or thing that produces a particular effect or change: a cleaning agent An agent is also a chemical substance, organism, or natural force that produces a particular effect by its action.
(Definition of agent from the Cambridge Academic Content Dictionary © Cambridge University Press)
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