双灵是至少150个北美原住民部落都有的一种社会角色，指的是「第三性」。双灵人在当代美国归类为男女同性恋，双性恋，跨性别，雌雄同体等人。以上说的部落各有自己的名词称呼，双灵（two-spirit）这一概括所有北美原住民类似观念的词源于1990年加拿大举行的第三次第一国族男女同性恋大会。

在传统部落中双灵人通常被视为体内拥有男女两个性别之灵魂的人，服装混合了男女两性的服装，在部落中有其特殊的身分与社会角色。例如在某些部落中男身双灵人会作巫医，辅导师或埋葬死者的工作，又例如也有女身双灵人作的酋长与猎人的工作的纪录。婚姻状况则类似普通人。

Two-Spirit (also two spirit or twospirit) is a modern umbrella term used by some indigenous North Americans to describe gender-variant individuals in their communities. The term was adopted in 1990 at an Indigenous lesbian and gay international gathering to encourage the replacement of the anthropological term berdache. It is a spiritual role that is recognized and confirmed by the Two-Spirit's indigenous community. While some have found the term a useful tool for intertribal organizing, not all Native cultures conceptualize gender this way, and most tribes use names in their own languages. While pan-Indian terms are not always appropriate or welcome, the term has generally received more acceptance and use than the term it replaced.