Definition of "actor" in Englisch

noun

1. (obsolete, law) Someone who institutes a legal suit; a plaintiff or complainant.

2. (obsolete) Someone acting on behalf of someone else; a guardian.

3. Someone or something that takes part in some action; a doer, an agent.

4. A person who acts a part in a theatrical play or (later) in film or television; a dramatic performer.

5. (obsolete, Ancient Rome) An advocate or proctor in civil courts or causes.

6. (grammar) The subject performing the action of a verb.

7. (software engineering) The entity that performs a role (in use case analysis).