Pansexuality, or omnisexuality, is the sexual, romantic or emotional attraction towards people regardless of their sex or gender identity. Pansexual people may refer to themselves as gender-blind, asserting that gender and sex are not determining factors in their romantic or sexual attraction to others.
Pansexuality may be considered a sexual orientation in its own right or a branch of bisexuality, to indicate an alternative sexual identity. Because pansexual people are open to relationships with people who do not identify as strictly men or women, and pansexuality therefore rejects the gender binary, it is often considered a more inclusive term than bisexual. To what extent the term bisexual is inclusive when compared with the term pansexual is debated within the LGBT community, especially the bisexual community.
The prefix comes from the ancient Greek word for "all, every", πᾶν; comes from Latin word for "all", omnis. Pansexual and pansexualism were first attested in 1917, denoting the idea "that the sex instinct plays the primary part in all human activity, mental and physical", a reproach (credited to Sigmund Freud) levelled at early psychology.
A literal dictionary definition of bisexuality, due to the prefix , is sexual or romantic attraction to two sexes (males and females), or to two genders (men and women). Pansexuality, however, composed with the prefix , is the sexual attraction to a person of any sex or gender. Using these definitions, pansexuality is defined differently by explicitly including people who are intersex or outside the gender binary.