a. A sleeved outer garment extending from the shoulders to the waist or below.
b. See suit coat.
2. The hair or fur of an animal: a dog with a short coat.
a. The outer covering of a biological structure or organ: a seed coat.
b. The outer covering of a virus.
4. A layer of material covering something else; a coating: a second coat of paint.
tr.v. coat·ed, coat·ing, coats
1. To provide or cover with a coat.
2. To cover with a layer: Dust coated the table. I coated the wall with paint.
[Middle English cote, from Old French, from Frankish *kotta; akin to Old High German kozzo and Old Saxon kot, cloak, mantle, all from an ultimate unknown source.]
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.