1relating to the instincts, physiological processes, and activities connected with physical attraction or intimate physical contact between individuals:she had felt the thrill of a sexual attraction
2relating to the two sexes or to gender:sensitivity about sexual stereotypes of or characteristic of one sex or the other:the hormones which control the secondary sexual characteristics
3 Biology (of reproduction) involving the fusion of gametes. being of one sex or the other; capable of sexual reproduction: the asexual winged forms lay the eggs which hatch into the sexual form