AGENT

Definition

1. noun an active and efficient cause.
2. noun a representative who acts on behalf of other persons or organizations.
3. noun a substance that exerts some force or effect.
4. noun a businessman who buys or sells for another in exchange for a commission. — synonyms: factor, broker
5. noun any agent or representative of a federal agency or bureau. — synonyms: federal_agent
6. noun the semantic role of the animate entity that instigates or causes the happening denoted by the verb in the clause. — synonyms: agentive_role