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Dictionary definition for: Agent

1. (n) an active and efficient cause; capable of producing a certain effect; "their research uncovered new disease agents"

2. (n) a substance that exerts some force or effect

3. (n) a representative who acts on behalf of other persons or organizations

4. (n) a businessman who buys or sells for another in exchange for a commission

5. (n) any agent or representative of a federal agency or bureau

6. (n) the semantic role of the animate entity that instigates or causes the hapening denoted by the verb in the clause

WordNet 2.1 Copyright Princeton University. All rights reserved.