[ek-sturn; for 3 also ik-sturn] 
| 1. | a person connected with an institution but not residing in it, as a doctor or medical student at a hospital. |
| 2. | a nun of a strictly enclosed order, as the Carmelites, who resides inside the convent but outside its enclosure and who chiefly goes on outside errands. |
| 3. | Archaic. external; outer. |
| ex·tern or ex·terne (ěk'stûrn') n. A person associated with but not officially residing in an institution, especially a nonresident physician on a hospital staff. [Latin externus, external; see external.] ex'tern·ship' n. |
extern ex·tern (ěk'stûrn')
n.
An advanced student or recent graduate who assists in the medical or surgical care of hospital patients and may reside outside the institution.
stɜrn