a person who works as an apprentice or trainee in an occupation or profession to gain practical experience, and sometimes also to satisfy legal or other requirements for being licensed or accepted professionally.
Also: internemed, US and Canadiana graduate in the first year of practical training after medical school, resident in a hospital and under supervision by senior doctorsBritish equivalent: house officer
mainlyUSa student teacher
mainlyUSa student or recent graduate receiving practical training in a working environment
1866, "to confine within set limits," from French interner "send to the interior, confine," from Middle French interne "inner, internal," from Latin internus "within, internal" (see internal; also cf. intern (n.)).
1879, American English, "one working under supervision as part of professional training," especially "doctor in training in a hospital," from French interne "assistant doctor," literally "resident within a school," from Middle French interne "internal" (see intern (v.)). The verb in this sense is attested from 1933. Related: Interned; interning.