What is the difference between bigender and ambigender?

Bigender covers two genders held at once and two genders alternating. Ambigender covers only the first: exactly two genders experienced simultaneously, static, without fluidity or shifting. Every ambigender person is bigender by that reading, and a bigender person who moves between two genders is not ambigender.

Can a bigender person also be genderfluid?

Yes, where the two genders alternate rather than sit together. The Nonbinary Wiki treats alternating bigender as a form of genderfluid identity, with the movement restricted to two genders or to shades between them. A bigender person who holds both genders continuously is not genderfluid, and Them notes that some experience the same pair for their whole lives.

Does bigender always mean man and woman?

No, and the assumption is the usual misreading. The two genders can be the binary pair, or a binary gender and a nonbinary one such as female and neutrois, or two nonbinary genders such as agender and aporagender. What the word fixes is the count rather than the contents.

Is bigender in a dictionary?

Merriam-Webster carries it, with an older non-identity sense meaning including both the male and female genders and a separate sense for the identity. Dictionary.com carries an entry too, dated to 2015 by the Nonbinary Wiki and to 2019 by Them.

When was bigender first written down?

The earliest dated use on file is 1992, in the magazine The Femme Mirror, where Donna Mobley described herself as dual-gendered. The Nonbinary Wiki puts a definition of bigenderist by the Human Outreach and Achievement Institute in the 1980s without naming a year, and Gary Bowen's Dictionary of Words for Masculine Women carried bigendered in 1995. That places the word well before the online coinages it is usually grouped with.

Bigender: Meaning, Origin & Who Uses It

Bigender

Bigender means having two distinct gender identities, held either at the same time or in alternation. The pair is not always male and female. The Nonbinary Wiki records people whose two genders are female and Neutrois, or agender and aporagender, and the assumption that the word must mean a man and a woman is the commonest misreading of it.

Merriam-Webster carries bigender, which puts it among the small number of terms in this catalogue with a dictionary of record behind it. The dictionary gives two senses, and only the second is an identity: the older one means designed for or including the male and female genders, as in a bi-gender group of lawmakers introducing a bill about restrooms.

Where bigender was written down first

The earliest dated attestation on file is 1992, when Donna Mobley wrote in the magazine The Femme Mirror that she was dual-gendered and that Don and Donna coexisted. Before that the Nonbinary Wiki records the Human Outreach and Achievement Institute, a trans organisation, defining bigenderist as a type of androgyne in the 1980s, without a year. Gary Bowen's A Dictionary of Words for Masculine Women carried bigendered in 1995, and a 1997 paper on the gender continuum in the International Journal of Transgenderism observed that a person who feels or acts as both a woman and a man may identify as bi-gendered.

The word therefore predates the online coinages that fill much of this catalogue, and its early record sits in printed community magazines and self-published dictionaries. The later markers are commercial: bigender was among the fifty-six gender options Facebook added in 2014 and among the thirty-seven Tinder added in 2017. The two records on file disagree about the dictionaries. The Nonbinary Wiki dates the Dictionary.com entry to 2015; Them dates the same entry to 2019.

Why bigender is not always genderfluid

Genderfluid and bigender answer different questions and overlap only in part. A bigender person whose two genders alternate is fluid by any reading, and the Nonbinary Wiki treats that case as a kind of genderfluid identity. A bigender person who holds both genders at once for a lifetime is not fluid at all, because nothing is moving. Them makes the point directly: some bigender people experience the same two genders at the same time their whole lives.

Genderflux is a third arrangement. Flux is a change in how strongly a gender is felt rather than in which gender is present, so a bigender person can hold two genders steadily while the intensity of either rises and falls.

How bigender differs from ambigender

Ambigender is the narrow word and the useful contrast. It names exactly two genders held simultaneously, static, with no fluidity or shifting, so a person who alternates is bigender but not ambigender. Bigender covers both arrangements, which is why the Nonbinary Wiki files ambigender underneath it. Trigender and polygender extend the same idea to larger counts, and all of them sit under the multigender umbrella.

What a medical hypothesis proposed about bigender

In 2012 Laura Case and Vilayanur Ramachandran reported in Medical Hypotheses on bigender people describing involuntary alternation between female and male states, and named the pattern alternating gender incongruity. They proposed that the alternation might reflect hemispheric switching in the brain and suggested tracking the nasal cycle and binocular rivalry as markers of it. The paper presents itself as a hypothesis rather than a finding, and its authors noted that no scientific literature had at that point attempted to explain or even describe bigenderism.

The measurement is similarly sparse. A 1999 survey by the San Francisco Department of Public Health found fewer than 3 per cent of transgender respondents assigned male at birth, and fewer than 8 per cent of those assigned female at birth, identifying as bigender. The Nonbinary Wiki records a frequency of 2.3 per cent. Both are shares of gender-diverse samples rather than of any general population.

Common questions

Questions about Bigender

What is the difference between bigender and ambigender?: Bigender covers two genders held at once and two genders alternating. Ambigender covers only the first: exactly two genders experienced simultaneously, static, without fluidity or shifting. Every ambigender person is bigender by that reading, and a bigender person who moves between two genders is not ambigender.
Can a bigender person also be genderfluid?: Yes, where the two genders alternate rather than sit together. The Nonbinary Wiki treats alternating bigender as a form of genderfluid identity, with the movement restricted to two genders or to shades between them. A bigender person who holds both genders continuously is not genderfluid, and Them notes that some experience the same pair for their whole lives.
Does bigender always mean man and woman?: No, and the assumption is the usual misreading. The two genders can be the binary pair, or a binary gender and a nonbinary one such as female and neutrois, or two nonbinary genders such as agender and aporagender. What the word fixes is the count rather than the contents.
Is bigender in a dictionary?: Merriam-Webster carries it, with an older non-identity sense meaning including both the male and female genders and a separate sense for the identity. Dictionary.com carries an entry too, dated to 2015 by the Nonbinary Wiki and to 2019 by Them.
When was bigender first written down?: The earliest dated use on file is 1992, in the magazine The Femme Mirror, where Donna Mobley described herself as dual-gendered. The Nonbinary Wiki puts a definition of bigenderist by the Human Outreach and Achievement Institute in the 1980s without naming a year, and Gary Bowen's Dictionary of Words for Masculine Women carried bigendered in 1995. That places the word well before the online coinages it is usually grouped with.

Added 2026-08-28 · Revised 2026-08-28