(archaic) Internal.

A student or recent graduate who works in order to gain experience in their chosen field. / A medical student or recent graduate working in a hospital as a final part of medical training.

(intransitive) To work as an intern. Usually with little or no pay or other legal prerogatives of employment, for the purpose of furthering a program of education.

(transitive) To imprison somebody, usually without trial.

A person who is interned, forcibly or voluntarily.

(rare) Between nations; international.

The doctrine that a particular mental phenomenon, such as motivation or justification, has an internal rather than external basis

plural of international

In an internal manner; within or inside of external limits; in an inner part or situation. / With regard to internal affairs. / Inwardly; spiritually.

A make of truck and other vehicles formerly manufactured by International Harvester.