Polyamory
The practice of having multiple simultaneous romantic relationships, openly and with the knowledge and consent of everyone involved.
Solo polyamory
A polyamorous practice that centers individual autonomy. Solo poly people typically don't pursue cohabitation, merged finances, or the relationship escalator with any partner — not because they don't love their partners, but because the structure of their life is theirs alone.
Relationship anarchy
An approach that refuses pre-ranked hierarchies between relationships. Each connection is defined by the people in it on its own terms — friendship is not ranked below romance, and no relationship has automatic priority.
V relationship
One person with two partners who are not romantically connected to each other. The two partners are metamours.
Triad
Three people who all share romantic relationships with each other. Less common in practice than people imagine — chemistry, time, and jealousy don't sum linearly.
Open relationship
A relationship that's sexually non-exclusive but romantically exclusive. Sometimes used as a modifier on other configurations.
Mono / poly
A configuration where one partner is monogamous and the other is polyamorous. Workable, and dependent on explicit agreements about disclosure, time, and emotional load.