n. pl. pro·pri·e·ties
a. Conformity to conventional standards of behavior or morality.
b. proprieties Socially correct usages or behaviors.
2. The quality of being proper; appropriateness.
[Middle English propriete, particular character, ownership, from Old French; see PROPERTY.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 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.