“Marriage (or wedlock) is a social union or legal contract between people that creates kinship. It is an institution in which interpersonal relationships, usually intimate and sexual, are acknowledged in a variety of ways, depending on the culture or subculture in which it is found. Such a union, often formalized via a wedding ceremony, may also be called matrimony.”

(Source: http://en.wikipedia.org/wiki/Marriage, Accessed 14 Dec 2011)