"part or character one takes," c.1600, from French rôle "part played by a person in life," literally "roll (of paper) on which an actor's part is written," from Old French rolle (see roll (n.)). Meaning "function performed characteristically by someone" is from 1875. In the social psychology sense from 1913. Role model first attested 1957.
role or rôle (rōl)
The characteristic and expected social behavior of an individual.