Definition of MARRIAGE
a (1) : the state of being united to a person of the
opposite sex as husband or wife in a consensual and contractual relationship recognized by law.
The Supreme Court Can't Unilaterally Change the Definition of Marriage
The fact of the matter is that after the Defense of Marriage Act (DOMA) became law under President Clinton's signature in 1996, a large majority of states affirmed the male-female definition. Many have done so by amending their state constitutions, and this all took place within the past 20 years.
Clearly, one can disagree with DOMA's definition of marriage, and the American people are free to repeal DOMA and endorse same-sex unions. But it would be a different thing altogether for the Supreme Court to redefine marriage