Someone or something that takes part in some action; a doer, an agent.
The entity that performs a role (in use case analysis).
A person who acts a part in a theatrical play or (later) in film or television; a dramatic performer.
The subject performing the action of a verb.
Somebody or something that meets requirements without exceeding them.
The rating given to somebody or something that meets requirements without exceeding them.
Causing satisfaction; agreeable or pleasant; satisfying.
Done to satisfaction; adequate or sufficient.
Making atonement for a sin; expiatory.