adj. 1 of or relating to sex, or to the sexes or the relations between them. 2 Bot. (of classification) based on the distinction of sexes in plants. 3 Biol. having a sex. sexual intercourse the insertion of a man's erect penis into a woman's vagina, usu. followed by the ejaculation of semen. sexuality n. sexually adv.
[ LL sexualis (as SEX) ]