role

role (http://definr.com/role)

     n 1: the actions and activities assigned to or required or
          expected of a person or group: "the function of a
          teacher"; "the government must do its part"; "play its
          role" [syn: function, office, part]
     2: an actor's portrayal of someone in a play; "she played the
        part of Desdemona" [syn: character, theatrical role, part,
         persona]
     3: what something is used for; "the function of an auger is to
        bore holes"; "ballet is beautiful but what use is it?"
        [syn: function, purpose, use]
     4: normal or customary activity of a person in a particular
        social setting; "what is your role on the team?"