cou·ri·er (krē-ər, kûr-, kŭr-)
a. A messenger, especially one on official diplomatic business.
b. A spy carrying secret information.
a. A personal attendant hired to make arrangements for a journey.
b. An employee of a travel agency serving as a guide for tourists.
[French courrier, from Old French, from Old Italian corriere, from correre, to run, from Latin currere; see kers- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 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.