1Composed of individuals all of the same sex; suited to or involving one sex only.
Having the male and female reproductive organs in different individuals; dioecious; producing only one kind of gamete (male or female), not hermaphroditic.
3Sexually attracted to members of one sex exclusively; not bisexual.
A person who is sexually attracted to members of one sex exclusively.
Late 19th century; earliest use found in The Philosophical Review. From mono- + sexual.