(US, informal) cohabitation, civil union / (US, informal) gay marriage

A marriage in which the partners decide not to have children, and to reserve the right to divorce amicably with mutual consent.

(derogatory, slang) Synonym of same-sex marriage

plural of Boston marriage

Marriage with a dead person or between dead people.

(historical) A long-term monogamous relationship between two unmarried women, especially in New England between the 18th and early 20th centuries.

(vulgar, offensive, derogatory) Same-sex marriage.

(UK, law) A giving out or boasting by a party that he or she is married to another, whereby a common reputation of their matrimony may ensue.

plural of walking marriage

(anthropology) In Mosuo culture, a relationship in which partners do not live in the same household, and their children are raised by their mothers and the mothers' families.