[n] 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"
[n] normal or customary activity of a person in a particular social setting; "what is your role on the team?"
[n] what something is used for; "the function of an auger is to bore holes"; "ballet is beautiful but what use is it?"
[n] an actor's portrayal of someone in a play; "she played the part of Desdemona"