Two-spirit
Also: 2-spirit, 2S
A modern, pan-Indigenous English umbrella term for the gender and sexual identities held within many Native American and First Nations cultures. It is specific to Indigenous people and is not a general LGBTQ+ or relationship-style label.
Two-spirit is an English umbrella term, adopted at a 1990 gathering of Indigenous people, for the diverse gender and sexual roles recognised across many — though not all — Native American and First Nations cultures, long predating European contact. Each nation has its own specific traditions and words; two-spirit serves as a shared term in English rather than a replacement for them. It can encompass gender role, spiritual role, and sexual orientation together, which is why it doesn't map neatly onto Western categories.
It appears here because two-spirit people may be part of non-monogamous and LGBTQ+ communities, and the identity is included in this site's inclusive taxonomy. The crucial point of respect is that two-spirit is specific to Indigenous people: it is not a general-purpose label for any non-binary or queer person, and using it outside that context is a form of appropriation the community has explicitly asked others to avoid.
For non-Indigenous readers, the right relationship to the term is to recognise it, understand that it carries cultural and spiritual meaning particular to Native communities, and defer to those communities on its use — rather than adopting it as a personal identity label.