three-person marriage; three-way relationship
Rare term for a marriage or domestic partnership involving three people, often implying a sexual relationship. Can refer to polyamorous arrangements or ménage à trois.
Three-person marriage is not legally recognized.
The novel depicts a life of a three-way marriage.
Standard kanji spelling.
Variant with Arabic numeral; less common than the kanji form.
Compound of 三人 (three people) and 婚 (marriage). The term is a modern coinage reflecting non-traditional relationship structures.