n. pl. sex·u·al·i·ties
a. The quality of being sexual, especially sexual orientation and behavior: the emerging sexuality of adolescents; people who are open about their sexuality.
b. A manner of being sexual or engaging in sexual activity: "Public conversations about sex education involve negotiation about which sexualities will be recognized and valued" (Janice Irvine).
c. Sexual activity: the decision to engage in sexuality.
2. The condition of being divided into sexes or of reproducing sexually: sexuality in angiosperms.
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.