Heart Lexicon

Unicorn - meaning and definition

Alsobisexual unicornunicorn woman

Definition

In non-monogamous dating, a single person (often a bisexual woman) who dates or joins an existing couple. Named for being sought after and supposedly rare.

At a glance

  • A single person who dates or joins an existing couple.
  • Often, but not always, a bisexual woman.
  • Named for being sought after and supposedly rare.
  • A healthy arrangement gives the third person an equal voice in boundaries.

In detail

A unicorn is someone who connects with both members of a couple, whether for a casual encounter or a longer-term triad. Some people proudly identify as unicorns and enjoy the dynamic.

The label also describes how a unicorn is sometimes treated: welcomed as an addition but expected to fit the couple's rules. A healthy arrangement gives the third person an equal voice in boundaries and decisions.

In a sentence

  • Bi, single and happy to be a unicorn for the right couple, as long as I have a say too.
  • I don't love being called a unicorn, it makes me sound like an accessory.

Where the word comes from

The name reflects how hard such a person was said to be to find, like the mythical creature. It became common in polyamorous and swinging communities in the 2000s.

Not to be confused with

  • Throuple

    A throuple is a committed three-person relationship; a unicorn may or may not be part of one.

Common questions

Why is it called a unicorn?

Because couples looking for a single partner interested in both of them often described such a person as rare, like the mythical animal.

What makes an arrangement with a unicorn fair?

Treating the third person as an individual with their own needs, agreeing boundaries together rather than presenting them as fixed rules, and accepting that connections may develop differently with each partner.

Related terms