1. The absence of war or other hostilities.
2. An agreement or a treaty to end hostilities: negotiated the peace.
3. Freedom from quarrels and disagreement; harmonious relations: roommates living in peace with each other.
4. Public security and order: was arrested for disturbing the peace.
5. Inner contentment; serenity: peace of mind.
Used as a greeting, a farewell, or a request for silence.
1. In a state of tranquility; serene: She is at peace with herself and her friends.
2. Free from strife: Everyone wants to live in a world at peace.
keep/hold (one's) peace
To be silent.
keep the peace
To maintain or observe law and order: officers who were sworn to keep the peace.
peace out Slang
Used to express "goodbye."
[Middle English pes, from Old French pais, pes, from Latin pāx, pāc-; see PAX.]
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.