Homosexuality

n. sexual attraction to members of the same sex

Homosexuality can refer to both attraction or sexual behavior between people of the same sex, or to a sexual orientation. When describing the latter, it refers to enduring sexual and romantic attraction towards those of the same sex, but not necessarily to sexual behavior. Homosexuality is contrasted with heterosexuality (attraction, behavior, or orientation between opposite sexes), bisexuality (both sexes), and asexuality (neither sex).
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Ho·mo·sex·u·al·i·ty n. 1. Sexual orientation to persons of the same sex. 2. Sexual activity with another of the same sex. [more]Homosexuality - Community and Resources

Noun
1. a sexual attraction to (or sexual relations with) persons of the same sex
(synonym) homosexualism, homoeroticism, gayness
(hypernym) sexual activity, sexual practice, sex, sex activity
(hyponym) inversion, sexual inversion

Sexuality directed toward someone of the same sex.