n. pl. mis·sion·ar·ies
1. One who is sent on a mission, especially one sent to do religious or charitable work in a territory or foreign country.
2. One who attempts to persuade or convert others to a particular program, doctrine, or set of principles; a propagandist.
1. Of or relating to missions or missionaries.
2. Engaged in the activities of a mission or missionary.
3. Tending to propagandize or use insistent persuasion: missionary fervor.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. 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.