marriage
noun
the state of being a married couple voluntarily joined for life (or until divorce)
“a long and happy marriage”
“God bless this union”
two people who are married to each other
“his second marriage was happier than the first”
“a married couple without love”
the act of marrying; the nuptial ceremony
“their marriage was conducted in the chapel”
a close and intimate union
“the marriage of music and dance”
“a marriage of ideas”
Source: WordNet 3.1, Princeton University