Nesting partner — a partner with whom a person lives under one roof and shares a household.
What it means
The term is especially common in polyamory, where it describes cohabitation specifically — without a mandatory link to hierarchy, “primary” status or marriage. A nesting partner is about a shared home, daily life, the cat and everyday routine, not the formal importance of the relationship. The person may also have other meaningful connections that live separately. The word “nesting” refers to the image of a shared “nest.” Separating “who I live with” from “who matters most to me” is useful: they do not always coincide, and this precision in language helps avoid misunderstandings within a network of relationships.
Example
Dasha and Artyom rent an apartment together and share chores, bills and morning coffee — they are nesting partners. At the same time, each of them has other relationships outside the shared home, which both of them openly know about.
Related terms
Hierarchical polyamory, Solo polyamory, Dyad
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