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