a·dul·ter·y (ə-dŭltə-rē, -trē)
n. pl. a·dul·ter·ies
Consensual sexual intercourse between a married person and a person other than the spouse.
[Middle English, from Old French adultere, from Latin adulterium, from adulter, adulterer; see ADULTERATE.]
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.