The noun marriage has 4 senses (first 3 from tagged texts)
1. (26) marriage, matrimony, union, spousal relationship, wedlock -- (the state of being a married couple voluntarily joined for life (or until divorce); "a long and happy marriage"; "God bless this union")
2. (10) marriage, married couple, man and wife -- (two people who are married to each other; "his second marriage was happier than the first"; "a married couple without love")
3. (2) marriage, wedding, marriage ceremony -- (the act of marrying; the nuptial ceremony; "their marriage was conducted in the chapel")
4. marriage -- (a close and intimate union; "the marriage of music and dance"; "a marriage of ideas")