Dating Dictionary · Updated September 18, 2026
Polyamory Meaning
Polyamory means more than one loving relationship with everyone's knowledge and consent, not the same as an open relationship or cheating.
Polyamory means having, or being open to having, more than one loving or intimate relationship at the same time, as long as everyone involved knows about it and agrees to it. That agreement, made openly rather than kept quiet, is what the word actually turns on: it's the difference between polyamory and a relationship someone never consented to.
Someone can describe themselves as polyamorous whether they currently have one partner, several, or none, since the term covers an openness to multiple consensual relationships as much as a current count. This page covers how the word is used in everyday US conversation, from dating profiles to relationship counseling.
Polyamory vs. similar terms, at a glance
These words get used interchangeably in everyday conversation, but they don't all mean the same thing. Here's how each one relates to polyamory, what it usually centers on, and where consent fits.
| Term | How it relates to polyamory | What it centers on |
|---|---|---|
| Consensual non-monogamy (CNM) or ethical non-monogamy (ENM) | Umbrella term; polyamory is one form of it | Covers any relationship style built on full knowledge and consent, including polyamory, open relationships, and swinging. Everyone involved knowing and agreeing is the baseline, not an option. |
| Open relationship | Overlaps with polyamory but is usually narrower | Typically describes a primary couple who agree to have sex with others outside the relationship, without necessarily building separate romantic bonds. Polyamory centers on having multiple loving relationships, not just outside sex. Both require everyone's consent. |
| Swinging | Related to polyamory but not the same thing | Centers on recreational sex with other people or couples, though friendships and deeper bonds can grow from it. Polyamory centers on ongoing romantic relationships rather than mainly sex outside the couple. Consent is required in both. |
| Polygamy | A different arrangement from polyamory | Means having multiple simultaneous marriages. Polyamory describes consensual multiple relationships and may include a married person without itself meaning multiple marriages. |
| Cheating | Not polyamory | Means a partner is involved with someone else without the other partner's knowledge or agreement. Polyamory requires that everyone involved knows and consents; cheating is a break of trust in any relationship type. |
What "polyamorous" tells you and what it leaves out
Saying you're polyamorous describes an orientation toward relationships, not a headcount. Someone can use the word while currently single, while seeing one person, or while juggling several relationships at once, and it says nothing on its own about how much sex, if any, is involved.
What the word does promise is that everyone affected knows the relationship is non-monogamous and agrees to the negotiated boundaries and level of disclosure. That open agreement is the foundation. A person who is polyamorous but currently uninvolved with anyone else isn't lying by using the word; they're describing how they approach relationships, not a live roster.
The shapes these relationships take
Polyamorous relationships aren't one format stretched thin. A few structures come up often enough that they have names.
Hierarchical primary and secondary. The National Coalition for Sexual Freedom describes primary relationships as typically including nesting activities such as living together, sharing finances, being married, or raising kids together, while secondary relationships usually mean living separately with less shared time and fewer long-term plans. A woman with a live-in husband and a partner she sees twice a month is a common real-world version of this setup.
Kitchen-table polyamory. The same organization defines this as a network of partners and metamours close enough to sit down together at the same table for a meal. Picture a holiday dinner where a woman's partner, his other partner, and that partner's own partner are all comfortable in the same room.
Parallel polyamory. Community resources use this label for an arrangement where a person's partners know about each other but do not build relationships with one another. Everyone is informed; nobody is required to become friends or even meet.
Polyfidelity. Community resources use this term for a closed group, often three or four people, that does not add new partners without agreement from everyone already in it. It functions like a sealed unit rather than an open network.
Relationship anarchy. Community resources use this label for an approach that resists automatically ranking relationships by category. A relationship anarchist may avoid words like primary or secondary while still negotiating different commitments or priorities in each connection, romantic or not.
A PLOS ONE study of a convenience sample of 1,308 self-identified polyamorous respondents found that respondents rated primary relationships higher on investment, satisfaction, and commitment and reported spending a greater proportion of their time together on sexual activity in secondary relationships.
Vocabulary you'll run into
A few terms show up constantly once you're reading about this. The National Coalition for Sexual Freedom defines a metamour as the partner of a partner: someone a person does not have a romantic or sexual relationship with themselves. A nesting partner is a partner someone lives with. The same organization defines compersion as joy at a partner's investment in and enjoyment of another romantic or sexual relationship.
Jealousy doesn't disappear, it gets talked about
Polyamory doesn't claim to solve jealousy. Researcher Valerie Rubinsky's qualitative study examined how people in polyamorous relationships understand jealousy and communicate about it with their partners. In practice, those conversations can make room to revisit boundaries, time, reassurance, and expectations rather than treating a difficult feeling as proof that the relationship structure has failed.
Compersion can coexist with jealousy; it is a positive feeling about a partner's happiness with another partner, not a requirement that replaces every uncomfortable reaction. The important part is whether the people involved can name what is happening and respond to it together.
Sex is not the requirement, agreement is
Polyamory can involve romantic relationships, sexual relationships, or both. Sexual activity is not the condition that makes an arrangement polyamorous; informed agreement is.
That's also the line that separates polyamory from a partner quietly seeing other people. If one person is in the dark, it is not a consensual arrangement. Genuine agreement is specific about whether other relationships are permitted, what disclosure and privacy boundaries apply, what sexual-health information is shared, and how time or commitments are handled. Changing accounts may justify a direct question or a personal boundary, but it does not reveal what another person consented to.
Polyamory questions: polygamy, legality, and city recognition
How is polyamory different from polygamy?
Polyamory means having, or being open to having, more than one loving relationship at a time, with everyone's knowledge and consent. It's a relationship style, not a marriage structure. Polygamy specifically means holding more than one marriage at once. For federal laws, rules, and regulations where marital status matters, U.S. law treats a marriage as being between two individuals. That federal rule does not define the legal treatment of consensual non-marital relationships between adults. Federal marriage law
Does polyamory itself create a marriage?
No. Polyamory describes consensual relationships; it is not a marriage category. The federal two-individual marriage rule applies when marital status matters under federal law, while state and local rules can address other relationship arrangements differently.
Do any U.S. cities officially recognize polyamorous relationships?
Somerville, Massachusetts, does through local domestic-partnership registration rather than marriage. Its ordinance, adopted June 25, 2020, allows people in a relationship of mutual support, caring, and commitment to register with the city clerk and obtain a certificate attesting to that status. The registration is a Somerville domestic-partnership measure with municipal effects, not a marriage. Somerville’s domestic-partnership ordinance
Sources and further reading
- Dictionary.com: Polyamory: Defines polyamory as simultaneous serious romantic or sexual relationships with every partner’s knowledge and consent.
- National Coalition for Sexual Freedom: What Professionals Need to Know About Consensual Non-Monogamy: A professional glossary covering primary and secondary relationships, kitchen-table polyamory, compersion, metamour, nesting partner, and how polygamy differs from polyamory.
- OPEN (Organization for Polyamory and Ethical Non-monogamy): What Is Non-Monogamy: Explains consensual and ethical non-monogamy as an umbrella term that includes polyamory, open relationships, and swinging, and why cheating falls outside it.
- City of Somerville Ordinance No. 2020-16: The text of Somerville’s domestic-partnership ordinance, including its registration rules and local rights.
- City of Somerville: Registering a Domestic Partnership: The city’s registration guidance for domestic partnerships, including partnerships with more than two people.
- Rubinsky, Bringing Up the Green-Eyed Monster (The Qualitative Report): A qualitative study of how people in polyamorous relationships understand and discuss jealousy with partners.
- Balzarini et al., Perceptions of Primary and Secondary Relationships in Polyamory (PLOS ONE): A study of 1,308 self-identified polyamorous respondents comparing reported investment, satisfaction, commitment, and sexual activity across primary and secondary relationships.
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