open marriage is a noun meaning "a marriage in which each partner is free to enter into extraneous sexual relationships without guilt or jealousy from the other". It carries one recorded sense.
a marriage in which each partner is free to enter into extraneous sexual relationships without guilt or jealousy from the other
Definitions, synonyms and semantic relations for open marriage come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.