An actor is someone whose job is acting in plays or films. 'Actor' in the singular usually refers to a man, but some women who act prefer to be called 'actors' rather than 'actresses'.
例句
His father was an actor in the Cantonese Opera Company...他的父親是粵劇團的演員。You have to be a very good actor to play that part.要想演那個角色，你必須是個非常出色的演員。