heterosexual

1. (of a person or other animal) Sexually attracted to members of the opposite sex.Examples: "Thai charter court rules that only heterosexual marriages are constitutional: Same-sex marriage in Thailand will have to wait, as the Constitutional Court ruled unanimously today (Wednesday) that Section 1448 of the Civil and Commercial Code, defining marriage as being a union between a man and a woman, is constitutional."Synonyms: straight, hetero, hetty, other-sex

2. (of a romantic or sexual act or relationship) Between two people of different sex.Examples: "Early Adolescence. This is the high school period between 14 and 17 years of age. This is a confusing and stressful period for the teenager, because sexual impulses are now quite strong in spite of societal sanctions against heterosexual activity."; "On the average, the [bisexual] women’s first heterosexual attraction and experience (at 11.6 and 14.7 years) occurred before their first homosexual attraction and experience (at 16.9 and 21.4 years)."; "Attempts at eliminating bias against LGBTQ people through education, academically and clinically, often lead to inclusion practices that are “added-on”, i.e., a family therapy course discusses same-sex couples as an addendum lecture at the end of the course, instead of infusing the material throughout the course. Green and Mitchell (2008) ask their readers to imagine authoring an article entitled “Therapy with Heterosexual Couples.”"

3. (obsolete, medicine) Having a sexual desire for the opposite sex seen as unhealthy, including a proclivity for nonreproductive sex.obsolete