in·tern also in·terne (ĭntûrn′)
a. A student or a recent graduate undergoing supervised practical training.
b. A physician who has recently graduated from medical school and is learning medical practice in a hospital under supervision, prior to beginning a residency program.
2. One who is interned; an internee.
v. in·terned, in·tern·ing, in·terns
To train or serve as an intern.
v.tr. (also ĭn-tûrn)
To confine, especially in wartime.
[French interne, from Latin internus, internal; see INTERNAL.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.