role

noun

1. 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

2. 2

   normal or customary activity of a person in a particular social setting

   what is your role on the team?

3. 3

   what something is used for

   the function of an auger is to bore holes

   ballet is beautiful but what use is it?

4. 4

   an actor's portrayal of someone in a play

   she played the part of Desdemona