An open marriage is one where both spouses consent to their partner having relationships with other people. Experts weigh in on how to define an open marriage.

O'Neill's definition of open marriage was more about opening oneself up to the world and not focusing on being a couple and nothing more. Interestingly, that is still the best marriage advice around.

I'm in an open marriage. Well, to be simultaneously more and less specific: I'm in a nonmonogamous marriage. An "open" marriage, in the nontraditional world, means that the couple may be having ...

An open marriage filled my relationship with Eric with painful elements that we didn't want to spend the rest of our life together rehashing. We could agree on that.

Monk believes that a carefully negotiated and agreed open marriage “can be wonderfully affirming, creating an environment that encourages freedom of expression, stress reduction and contentment”.

Danielle, who has been in an open relationship with her husband for over a decade, says marriage, for them, is much bigger than sexual exclusivity.

The term “open marriage” has come a long way. It once implied that people had the freedom to choose who they would like to marry, but with the publication of the classic book Open Marriage by ...