The longer entries. Where each term comes from, who shaped it, and what to watch for.

Care to linger?

The history matters more than people think. Many of these words are younger than they sound, and many carry quiet politics that affect how they land in a therapy room or a family conversation.

A

Amatonormativity. The cultural assumption that long-term exclusive romantic partnership is universally desirable and inherently more valuable than other forms of connection: friendship, family, community, solitude. Coined by philosopher Elizabeth Brake in Minimizing Marriage (2012) as a parallel to heteronormativity. A useful conceptual tool; the word itself is academic-flavored and may need to be defined for general audiences.

Anchor partner. A partner who provides a primary stabilizing relational base, whether or not they cohabit. Distinct from "nesting partner," which specifically implies shared household. Useful for people who want to describe a centrally important relationship without using the language of hierarchy.

A

B

Boundaries. What you will or won't do, based on your own limits. Distinct from agreements, which describe what two or more people negotiate together. The terms are often used interchangeably, and the distinction matters. A boundary is about yourself ("I won't stay in a conversation where I'm being yelled at"). An agreement is about the relationship ("We'll text each other if we're going to be home late"). In CNM contexts, conflating the two is one of the most common sources of conflict, and one of the most common reasons agreements feel like cages instead of containers.

C

Comet. A partner with whom one has a recurring but non-continuous relationship; they "pass through" periodically. Borrowed from astronomy via the polyamory community. A helpful descriptor when people are trying to name a real but non-standard relationship pattern.

Communication-based ethics. A framework that grounds the ethics of consensual non-monogamy in transparent communication, informed consent, and ongoing negotiation, rather than in pre-set rules or external moral codes. The dominant ethical model in the contemporary CNM literature. Closely associated with Dossie Easton and Janet Hardy's The Ethical Slut (1997) and developed further by Eve Rickert and Franklin Veaux's More Than Two (2014).

Compersion. A positive affective response, warmth or gladness or enjoyment, at a partner's pleasure or happiness in another relationship. Often described as the opposite of jealousy, though more accurately a complementary rather than opposing emotion. Cultivated rather than automatic. The term emerged from the Kerista commune in San Francisco in the 1970s.

Consensual non-monogamy (CNM). An umbrella term for relationship structures in which all involved adults consent to sexual and/or romantic involvement with more than one partner. CNM is the dominant term in academic and clinical writing. Researchers like Conley, Moors, Matsick, and Ziegler have anchored it in the peer-reviewed literature since the early 2010s. Used as a deliberately neutral container that includes polyamory, swinging, open relationships, relationship anarchy, and other configurations.

E

Ethical non-monogamy (ENM). A widely-used community term for consensual non-monogamy, emphasizing the consensual and transparent nature of the relationships. Popularized in the 1990s and 2000s within North American community writing; traceable to Dossie Easton and Janet Hardy's The Ethical Slut. The "ethical" qualifier was originally meant to distinguish negotiated non-monogamy from infidelity, but some recent community critique has pushed back on the implicit framing of monogamy as the unmarked default. Both ENM and CNM are in active use; CNM carries more academic weight.

D

De-escalation. The negotiated reduction of relational entanglement: moving from cohabiting partners to non-cohabiting partners, say, or from romantic to platonic, or from primary to non-primary, without ending the relationship. A distinctly CNM concept; in monogamy-centric language, "the relationship downgraded" carries failure connotations. De-escalation reframes the shift as movement along a continuum, not a fall from a peak.

Differentiation of self. The capacity to maintain a clear sense of self while remaining in emotional connection with significant others. The core concept of Murray Bowen's family systems theory; later developed by David Schnarch in Passionate Marriage (1997) and applied widely in CNM clinical work. Highly relevant to relational diversity because non-monogamous configurations stress-test differentiation in ways monogamous ones often don't.

Don't-ask-don't-tell (DADT). A consensual non-monogamy arrangement in which outside activity is permitted but specific information is not shared. Sometimes a stable preference, sometimes a transitional structure, sometimes a way of avoiding harder conversations. Worth distinguishing from infidelity, which lacks the consent.

G

Garden-party polyamory. A middle position between kitchen-table and parallel polyamory. Metamours meet occasionally in social or celebratory contexts (birthdays, holidays, milestones) but don't share daily life.

GSRD (Gender, Sexuality and Relationship Diversity). An umbrella framework developed by Dominic Davies and Pink Therapy in the UK to describe the full field that includes LGBTQ+ identities, kink, polyamory, asexuality, and other non-traditional configurations. Increasingly the standard professional term in UK and Irish therapy contexts.

H

Hierarchical polyamory. A polyamorous configuration in which one relationship has explicit structural priority over others through agreements, time, resources, or decision-making authority. Worth distinguishing between descriptive hierarchy, which acknowledges that one relationship carries more entanglement (cohabitation, marriage, shared children) without granting authority over other relationships, and prescriptive hierarchy, where one partner holds authority (such as veto rights) over another partner's relationships. Prescriptive hierarchy is contested ethically within the community.

Heteronormativity. The cultural assumption that heterosexuality is the natural and normative form of sexual orientation, with corresponding gendered expectations about romance, family, and partnership. Coined by Michael Warner in 1991.

K

Kitchen-table polyamory (KTP). A relational style in which metamours interact socially and could comfortably share daily life. The metaphor is everyone sitting around the same kitchen table. Distinct from parallel polyamory. KTP works well for some people and is unsustainable for others; it's a style choice, not an ethical standard.

M

Metamour (Meta). A partner's other partner. Someone you are connected to through a shared partner without having a direct romantic or sexual relationship with them yourself. Metamour relationships range from close friendship to formal cordiality to genuine dislike. The only requirement is the structural connection.

Mono/poly relationship. A relational configuration in which one partner is monogamous (by orientation or preference) and the other is consensually non-monogamous. A distinct clinical territory with its own dynamics, not simply "polyamory minus one partner." Workable when both parties freely consent and have ongoing capacity for the asymmetry; thorny when one party is silently accommodating.

Mononormativity. The cultural assumption that monogamy is the natural, normal, or superior form of intimate relationship. Functions in CNM literature the way heteronormativity functions in queer theory, as a name for the unmarked default. Coined in sociology around 2005 to 2010. Used clinically as a bias-awareness construct: the work isn't to make therapists pro-poly, it's to help them notice when they're unconsciously importing monogamous assumptions into a client's formulation.

Monogamish. A predominantly monogamous relationship with negotiated openings for occasional outside sexual contact. Coined by sex columnist Dan Savage. The term names a real and common configuration that doesn't fit cleanly into "open" or "closed."

N

Nesting partner. A partner with whom one shares a household. Distinct from "primary partner," which implies hierarchical priority. Nesting is a description of living arrangement, not status.

New relationship energy (NRE). The heightened affective, physiological, and cognitive state characteristic of the early phase of a new romantic or sexual relationship: the rush of infatuation, idealization, absorption. The CNM literature has paid particular attention to NRE because it can destabilize existing relationships if not consciously managed. The neurobiology overlaps with what attachment researchers call the early protest-and-pursuit phase of pair-bonding.

Non-hierarchical polyamory. A polyamorous configuration in which no relationship is granted structural priority over another. Often paired with the practice of allowing each relationship to take whatever shape suits the people in it, without external categories like "primary" or "secondary." Practiced in different forms by different people; not always strictly egalitarian in lived reality.

O

Open marriage. A marriage in which the spouses have agreed to permit sexual and/or romantic involvement outside the marital dyad. Popularized by Nena and George O'Neill's 1972 book of the same title, though the original meaning was closer to "a marriage with personal autonomy" than to sexual openness. The term drifted in popular usage.

Open relationship. A relationship, usually but not always a couple, in which partners have agreed that one or both may engage in sexual and sometimes romantic connections outside the primary relationship. Often the first vocabulary people find before they discover more specific terms. Ambiguous in scope, so worth clarifying what each person means by it.

P

Parallel polyamory. A relational style in which metamours don't interact socially; relationships run alongside each other rather than overlapping. Often a deliberate choice for reasons of capacity, privacy, geography, or temperament. Not a sign of dysfunction.

Polyagency. A concept in circulation in newer polyamory writing referring to each person's capacity to act as an agent in shaping their relationships, independent of partner approval. Useful framing for non-hierarchical and solo polyamory work, though the term is still emerging and not yet stable in usage.

Polyamory. The practice of, or orientation toward, multiple concurrent loving relationships with the informed consent of all involved. Etymologically a Greek-Latin hybrid (poly + amor). The term is generally credited to Morning Glory Zell-Ravenheart's 1990 essay "A Bouquet of Lovers" and to Jennifer Wesp, who coined the Usenet group "alt.polyamory" in 1992. Polyamory specifically denotes the loving and romantic form of CNM and is distinct from swinging (recreational-sexual) or open relationships (which may or may not include emotional involvement).

Polycule. The full set of romantic and/or sexual relationships interconnected through one or more shared partners. A portmanteau of "polyamorous" and "molecule." Some communities prefer the more neutral "relational network."

Polyfidelity. A closed CNM arrangement in which a defined group of three or more partners is sexually and/or romantically exclusive to one another. Effectively monogamy for three or more.

Polysecurity. Attachment security developed and maintained across multiple concurrent partnerships, articulated by Jessica Fern in Polysecure (2020). Fern's HEARTS model (Here, Expressed delight, Attunement, Rituals and routines, Turning toward after conflict, Secure attachment with self) is a clinical scaffold for building polysecure attachment. Polysecure and its follow-up Polywise (2023) have become widely cited in CNM clinical practice, though some attachment researchers have noted the framework outpaces the empirical base. Useful clinically, still being validated.

Primary / secondary / tertiary partners. Hierarchical descriptors locating partners by structural priority. Some practitioners and clients find these labels clarifying; others find them reductive or harmful, particularly the experience of being labeled "secondary." When people use these terms, worth exploring what they mean by them rather than assuming a shared definition.

Q

Quad. A four-person relationship configuration, typically though not always two couples interconnected through additional relationships.

Queer-affirmative therapy. Clinical practice that treats LGBTQ+ identities as healthy variants of human experience, attends to the impact of minority stress, and avoids pathologizing sexuality and gender diversity. Foundational to GSRD-aware clinical work though distinct from CNM-specific competence.

R

Relationship anarchy (RA). A relational philosophy that declines to rank or categorically distinguish relationships (romantic, sexual, platonic), instead negotiating each relationship on its own terms. Coined by Andie Nordgren in the Swedish pamphlet The Short Instructional Manifesto for Relationship Anarchy (2006). The word "anarchy" carries political connotations that can alarm mainstream readers; the clinical content of the framework, non-hierarchical and non-categorical relating, is useful regardless of one's relationship to the politics.

Relationship escalator. The culturally scripted progression of dating, exclusivity, cohabitation, marriage, joint finances, and children that is widely treated as the marker of relational seriousness. Concept and term popularized by Amy Gahran. A useful frame for people trying to articulate why their relationships, which don't follow that script, feel real to them despite not "looking like" relationships from the outside.

Relational orientation. A person's pattern of preferred relational structure: monogamous, polyamorous, relationship-anarchic, and so on. Analogous to but distinct from sexual orientation. Some people experience their relational orientation as fixed and identity-defining; others experience it as configurable or context-dependent.

S

Secure-functioning relationship. A couple or relational unit organized around mutual protection, fairness, and sensitivity. The phrase is Stan Tatkin's, from PACT (Psychobiological Approach to Couple Therapy). Although Tatkin's work focuses on monogamous couples, the secure-functioning frame translates well into CNM clinical contexts.

Shame regulation. The capacity to tolerate, modulate, and integrate shame without dysregulation or defensive flight. Central to clinical work in relational diversity because so many CNM-related presenting issues, like jealousy, fear of abandonment, and fear of social exclusion, are downstream of shame.

Solo polyamory. A polyamorous orientation in which the individual doesn't have or seek a primary nesting partner, conducting relationships from an autonomous base. Sometimes mistaken for "single but dating multiple people"; the distinction is that solo polyamorists structure their lives around their own autonomy rather than around partnered life, by choice.

Swinging / the lifestyle. A form of consensual non-monogamy oriented primarily around recreational sexual activity, typically as a couple, often in social settings: clubs, parties, organized events. With limited emphasis on emotional or romantic involvement with additional partners. Swingers are a clinically distinct population from polyamorous clients, with different presenting concerns. Conflating them is a common error.

T

Throuple. A romantic and/or sexual relationship involving three people. Used somewhat informally; more clinically, "triad."

Triad. A romantic and/or sexual relationship involving three people, configurable as a closed triad (all three partnered with all others), an open triad (the three are partnered with each other and may also have outside relationships), or a V (one partner connected to two others who are not partnered with each other).

Triangulation. A Bowenian concept describing the discharge of dyadic anxiety through the involvement of a third person. Distinct from, and not synonymous with, a triadic relational structure. The terminological collision matters clinically: a triad is a structure, triangulation is a process, and they can occur independently.

V

V (vee). A three-person configuration in which one partner is romantically and/or sexually involved with two other people who are not partnered with each other. The "V" describes the shape of the relational network.