n. pl. a·troc·i·ties
1. Appalling or atrocious condition, quality, or behavior; monstrousness.
2. An appalling or atrocious act, situation, or object, especially an act of unusual or illegal cruelty inflicted by an armed force on civilians or prisoners.
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.