Webster's Revised Unabridged Dictionary · 1913

Intern

Intern , adjective

[Latin internus: compare French interne. See Internal.]

Internal. [Obsolete] — Howell

Intern , transitive verb

[French interne. See Intern, a.]

1.
To put for safe keeping in the interior of a place or country; to confine to one locality; as, to intern troops which have fled for refuge to a neutral country.
2.
To hold until the end of a war, as enemy citizens in a country at the time of outbreak of hostilities; -- an action performed by countries.

intern , noun

[French]

1.
(Medicine) A resident physician in a hospital, especially one who has recently received the Doctorate and is practising under supervision of experienced physicians, as a continuation of the training process; a house physician; also called houseman in Britain.
2.
A person working as an apprentice to gain experience in an occupation; sometimes the position is paid a salary, and other times it is not; as, a white house intern; an intern in a law firm.