open marriage
noun
Definition of open marriage
: a marriage in which the partners agree to let each other have sexual partners outside the marriage
From the M-W Editors
1971
First Known Use of open marriage
1971
OPEN MARRIAGE Defined for English Language Learners
open marriage
noun
Definition of open marriage for English Language Learners
-
: a marriage in which both people agree to allow each other to have sex with other people
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