Home › Words › H › heterosexualityheterosexualityheterosexuality means the state of being sexually and romantically attracted primarily or exclusively to persons of the opposite sex.EtymologyFrom heterosexual + -ity or hetero- + sexuality.nounThe state of being sexually and romantically attracted primarily or exclusively to persons of the opposite sex.Sexual activity with a person of the opposite sex.Definitions & examples from Wiktionary (CC BY-SA 3.0).