1. Of, relating to, involving, or characteristic of sex, sexuality, the sexes, or the sex organs and their functions.
2. Implying or symbolizing erotic desires or activity.
3. Relating to, produced by, or involving reproduction characterized by the union of male and female gametes: sexual reproduction.

[Late Latin sexuālis, from Latin sexus, sex.]

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.