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2.
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.
by Politicallyincorrect March 12, 2005
 
1.
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'
by A-d-am April 05, 2004