Polyfidelity — a form of non-monogamy in which several partners form a closed group and stay faithful only within it, taking on no connections beyond its bounds.
What it means
The word combines “poly” (many) and “fidelity” (faithfulness). Unlike open formats, polyfidelity assumes a closed circle: everyone involved agrees that intimacy is only possible within the group. Such a structure requires a high level of trust, honest communication and shared agreements about rules and caring for one another. It is one of many forms of ethical non-monogamy, and it is not right for everyone.
Example
Three or more partners agree that their relationship stays closed and no new connections are formed outside the group. That is polyfidelity.
Related terms
Polyamory, consensual non-monogamy, boundaries in relationships.
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