role

Definitions

General English

General Science

  • noun a function that something or someone performs
  • noun the set of characters, chemical, physical and biological, that determine the position of an organism or species in an ecosystem, e.g. aquatic predator or terrestrial herbivore

Human Resources

  • noun a part played by someone in a workplace or organisation

Information & Library Science

Media Studies

  • noun a person’s social position in relation to others
  • noun an individual part in a play, film, opera or other performance

Medical

  • noun the usual or expected function of somebody or something in a particular process or event
  • noun the characteristic or expected pattern of behaviour of a particular member of a social group

Military

  • noun the function or purpose for which a person or thing is used
http://www.dictionarycentral.com/definition/role.html