noun
a sexual attraction to (or sexual relations with) persons of the opposite sex
• Syn: ↑heterosexualism, ↑straightness
• Derivationally related forms: ↑straight (for: ↑straightness), ↑heterosexual
• Hypernyms: ↑sexual activity, ↑sexual practice, ↑sex, ↑sex activity
Useful english dictionary. 2012.