definition of
role

[1] #1 role n. [function, office, part] 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". wn

[2] #2 role n. [character, theatrical role, part, persona] an actor's portrayal of someone in a play; "she played the part of Desdemona". wn

[3] #3 role n. [function, purpose, use] what something is used for; "the function of an auger is to bore holes"; "ballet is beautiful but what use is it?". wn

[4] #4 role n. normal or customary activity of a person in a particular social setting; "what is your role on the team?". wn