A pervasive and institutionalized ideological system that naturalizes heterosexuality as universal; it must continually reproduce itself to maintain hegemony over other non-normative sexualities and ways of identity construction.
marriage, traditional family values, the Christian Coalition, suburbia, 'the American Dream'
See previous definition. Additionally: When Political Correctness goes so far as to attack the natural order of male-female relations.
Traditional marriages are politically incorrect because they're grossly heteronormative.
Wow, a husband and wife!? That's SO hetero.