Marriage -- According to Merriam-Webster OnLine

Check out the Merriam-Webster OnLine definition of marriage:

Main Entry: mar·riage
Pronunciation: 'mer-ij, 'ma-rij
Function: noun
Etymology: Middle English mariage, from Anglo-French, from marier to marry
1 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>

tags: homosexuality, homosexual, gay