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Definition of 'agent'


  1. an active and efficient cause; capable of producing a certain effect; "their research uncovered new disease agents"
  2. a substance that exerts some force or effect
  3. a representative who acts on behalf of other persons or organizations
  4. a businessman who buys or sells for another in exchange for a commission
       Synonyms: factor broker
  5. any agent or representative of a federal agency or bureau
       Synonyms: federal agent
  6. the semantic role of the animate entity that instigates or causes the happening denoted by the verb in the clause
       Synonyms: agentive role

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