heteronormativity

a set of social norms supporting heterosexuality as the dominant sexuality as well as the alignment of biological sex, sexuality, gender identity, and gender roles (Lovaas & Jenkins, 2006)

definitions

The belief that people fall into distinct and complementary genders (man and woman) with natural roles in life. (Wikipedia)

The view that all human beings are either male or female, both in sex and in gender, and that sexual and romantic thoughts and relations are normal only when between people of different sexes. (Wordnik)

Heteronormativity emphasises the extent to which everyone, straight or queer, will be judged, measured, probed and evaluated from the perspective of the the heterosexual norm. It means that everyone and everything is judged from the perspective of straight. (Chambers, 2009)

A set of social norms supporting heterosexuality as the dominant sexuality as well as the alignment of biological sex, sexuality, gender identity, and gender roles. (Lovaas & Jenkins, 2006)