A person who is attracted solely or primarily to others of the same sex.
(of a person or animal) Possessing sexual and/or emotional attraction towards members of the same sex. Examples being a male androphile or a female gynephile. (Sometimes used in the sense of sole/exclusive attraction.)
(of a romantic or sexual act or relationship) Between two people of the same gender-area; gay.
My sister is currently in a homosexual relationship with a girl in her class.
Intended for or used by homosexuals, as a nightclub, a bar, etc.