different between postgender vs postgenderism

English

post- +? gender

postgender (not generally comparable, comparative more postgender, superlative most postgender)

(Having moved) beyond gender; not (any longer) gendered.
- 2007, Helen Boyd, She's not the man I married: my life with a transgender husband, page 192:
  Gay and lesbian folks don't have a corner on the market — of course there are straight people who think about gender — but odds were better that our gay and lesbian friends were going to be a little more postgender in their thinking, [...]
- 2010, Alice Adams, Shameless propositions: women's sexuality and theoretical authority, page 139:
  Those who gesture with revolutionary fervor toward a postgender or post-binary or post-male-dominated world cannot, as the old saw has it, get there from here.
(of a marriage or couple) Which divides household labor equally or in a manner other than according to traditional gender roles.
- 2002, Adie Nelson, Barrie Robinson, Gender in Canada, page 455:
  Traditional gender manifests itself among postgender dual-career couples in a common, but not universal, tendency for wives to hold higher standards for household cleanliness.

postgender (plural postgenders)

(rare) A person who is postgender, who is not (any longer) gendered, or who does not (any longer) identify as gendered.
- 2001, Joseph Slade, Pornography and sexual representation: a reference guide, volume 2, page 373:
  Contributors to Posthuman Bodies, edited by Judith Halberstam and Ira Livingston, offer futuristic looks at "queers," trans-genders, postgenders, and automated teller machines,
- 2001 Jan Wickman, Transgender politics: the construction and deconstruction of binary gender in the Finnish transgender community, page 204:
  Similarly, there will be all sorts of individuals among trans-people too: we are not represented by transsexuals only, there are transvestites, transgenders, genderblenders, postgenders etc. in our midst.

See the usage note at transgender regarding the use of this type of word as a noun.

post- +? gender +? -ism

postgenderism (uncountable)

A sociopolitical and cultural movement which arose from the eroding of the cultural, biological, psychological and social role of gender, and an argument for why the erosion of binary gender will be liberatory.
A sociopolitical and cultural movement for the voluntary elimination of gender in the human species through the application of biotechnology.