What is marriage?
According to Wikipedia:
A nonethnocentric definition of marriage is a culturally sanctioned union between two or more people that establishes certain rights and obligations between the people, between them and their children, and between them and their in-laws.
According to Mirriam Webster:
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 (2) : the state of being united to a person of the same sex in a relationship like that of a traditional marriage <same-sex marriage>
b : the mutual relation of married persons : wedlockc : the institution whereby individuals are joined in a marriage
According to the Bible: