actor

Definitions

• A person who performs in a theatrical play or film.
• One who acts; a doer.
• One who takes part in a situation.
• (legal) An advocate or proctor in civil courts or causes.
• (legal) One who institutes a suit; plaintiff or complainant.
• (policy debate) One who enacts a certain policy action.
• (software engineering) The entity that performs a role (in use case analysis).
• (linguistics) The most agent-like argument of a clause, e.g. 'the torpedo' in "The torpedo sank the boat" and "The torpedo fired".