monosexual adjective 2noun 1forms 1 adjective2 •Composed of, or relating to, only one sex.On the other hand, he did not go to a monosexual [all-boys] school as I did, as Isherwood and his kind did. — 2018 •Sexually attracted to members of only one sex or gender.How are we to understand the erasure of bisexuality in some of the fundamental works of queer deconstructive theory? […] a reliance on monosexual gay/lesbian historiography […] — 2013 noun1 •A monosexual person.Letitia, I fear, is a monosexual. Only men arouse her. — 1968 formsmonosexuals