n.
    - a person who lives somewhere on a long-term basis. 
▸a bird, butterfly, or other animal of a species that does not migrate.
 ▸Brit. a guest in a hotel who stays for one or more nights.
 ▸US a pupil who boards at a boarding school.
 - N. Amer. a medical graduate engaged in specialized practice under supervision in a hospital.
 - an intelligence agent in a foreign country.
 - historical a British government agent in any semi-independent state, especially the Governor General's representative at the court of an Indian state.
 
adj.
  - living somewhere on a long-term basis. 
▸having quarters on the premises of one's work.
 ▸attached to and working regularly for a particular institution.
 ▸(of a bird, butterfly, or other animal) non-migratory.
 - (of a computer program, file, etc.) immediately available in computer memory, rather than having to be loaded from elsewhere.
 
 
  Derivative
  
    
      - residentship n. (historical).
 
    
   
  Etymology
  ME: from L. resident-, residere ‘remain’.