Definition of: intern

(in·tûrn′) v.t.
To confine or detain within the limits of a country or area, as enemy aliens, or, in neutral countries, soldiers, ships, etc., of warring countries.
—v.i. To undergo resident training in medicine or surgery in a hospital; be an intern.
—adjective Archaic Internal.
—noun (in′tûrn)
1. An advanced medical student or graduate undergoing resident training in a hospital: opposed to extern.
2. A person confined and segregated in wartime as a prisoner of war or enemy alien. Also in′terne. [<F interne resident within <L internus internal]
—in′tern·ship (-ship) noun