• Noun: the actions and activities assigned to or required or expected of a person or group; examples: "the function of a teacher", "the government must do its part", "play its role"
• Noun: an actor's portrayal of someone in a play; example: "she played the part of Desdemona"
• Noun: what something is used for; examples: "the function of an auger is to bore holes", "ballet is beautiful but what use is it?"
• Noun: normal or customary activity of a person in a particular social setting; example: "what is your role on the team?"