1. A defensive covering, as of metal, leather, or synthetic materials, worn to protect the body against weapons.
2. A tough, protective covering, such as the bony scales covering certain animals or the metallic plates on tanks or warships.
3. A safeguard or protection: faith, the missionary's armor.
a. The combat arm that deploys armored vehicles, such as tanks.
b. The armored vehicles of an army.
tr.v. ar·mored, ar·mor·ing, ar·mors
To cover with armor.
[Middle English armure, from Old French armeure, from Latin armātūra, equipment; see ARMATURE.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 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.