What is "externe"

Externe \Ex`terne"\, Extern \Ex*tern"\([e^]ks`t[e^]rn"), n. [F. Cf. Extern.] a person affiliated with an institution who does not reside there; especially, (Med.) a doctor or medical student who is in attendance upon, or is assisting at, a hospital, but who does not reside in it.

n. A person affiliated with an institution who does not reside there, especially a doctor or medical student in attendance upon a hospital, but not residing in it.