intern

Concise Oxford English Dictionary © 2008 Oxford University Press:
intern

▶noun /ˈɪntəːn/ (also interne) N. Amer. a recent medical graduate receiving supervised training in a hospital and acting as an assistant physician or surgeon.

■ a student or trainee who does a job to gain work experience or for a qualification.

▶verb

• 1 /ɪnˈtəːn/ confine as a prisoner.

• 2 /ˈɪntəːn/ N. Amer. serve as an intern.

– derivatives
internment noun,
internship noun.

– origin C16 (as an adj. in the sense ‘internal’): from Fr. interne (adj.), interner (v.), from L. internus ‘inward, internal’.