I challenge your definition of 'gender', it seems you have cherry picked the definition to your liking, and from Wikitioniary too! (which can be edited by anyone). Here are more credible sources you conveniently ignored...

Oxford : the state of being male or female (typically used with reference to social and cultural differences rather than biological ones):

Marrian Webster : the state of being male or female.

Dictionary.com : either the male or female division of a species, especially as differentiated by social and cultural roles and behaviors

But Dictionary.com has another definition labelled under third gender!

However, this word has no origin, and so was likely coined recently. Indeed, no other dictionary (except Wikipedia) site seems to offer any definition on 'third gender'.

Based on the definitions, does it seem to validate genderfluidity and transgenders? Yes.

However, the traditional definition will also rules out labelss like bigender, agender, and other like terms already!
Its shocking how all these labels are all being abused and changing so that people can convince themselves they are special snowflakes!

Edited 4/17/2016 02:55:49

Here's a dose of realism.

Men are born with dicks, Women are born with vaginas.

Imagine that!

A Man: Produces sperm in his testicles.
A Women: Produces eggs in her ovaries.

If you can't produce eggs with a dick or sperm with a vagina, your not a man-born-as-a-women or a women-born-as-a-man.

Oxford : the state of being male or female (typically used with reference to social and cultural differences rather than biological ones):

I no longer wield Oxford after doing a bit of research on it. Their "word" of the year for 2015 was an emoji, they have just wrong or inapplicable meanings in some of their words (see http://www.oxforddictionaries.com/definition/english/karakalpak?q=Karakalpak), they have a good blog, that's it.

I haven't heard of nor wielded Mirriam-Webster, so I couldn't really tell you much about its goodness.

Dictionary.com (of which I haven't really looked into, either) agrees with me, I don't see what's the dispute, here. See their usage note, too. Doesn't matter if it's coined recently, it's still a word.

I frankly think that Wiktionary is underrated as a dictionary, I think it's the best online dictionary there is. Sure, it can be edited by anyone, but the anti-vandalism jobs are really good at their work, they really hound folk about sourcing, I don't see any problems. It has many dialectal words that Oxford just leaves out, like "frain", and actually gets it right (see https://en.wiktionary.org/wiki/Karakalpak). For non-English tongues, I get where you're coming from, but it's fine for English.

Seriously, gender is just a handy word to tell apart from sex. Folk whose gender is different from their sex, they're weirdos. What've you against this easy classification? And obviously, words can't have sex organs.

Men are born with dicks, Women are born with vaginas.

A Man: Produces sperm in his testicles.
A Women: Produces eggs in her ovaries.

What do you have to say about castrated men or women? Genderless?

Edited 4/17/2016 05:55:14

Okay, Wikitionary by the average Joe is more accurate than the Oxford Dictionary, which is constantly being developed at millions of pounds. Why the word Karakalpak is even relevant to the English dictionary, I don't know.

But you're right, genders gives a easy classification from sex in today's politically correct world. I was merely arguing against the rationale of people describing themselves bigender of agender or other like terms.

Edited 4/17/2016 08:22:46

" as political and economic freedom diminishes, sexual freedom tends compensatingly to increase. "

~ Aldous Huxley

Okay, Wikitionary by the average Joe is more accurate than the Oxford Dictionary, which is constantly being developed at millions of pounds.

I definitely think so. Those money are being wasted for Oxford. It has a good blog, that's it. An omission: http://www.oxforddictionaries.com/spellcheck/english/?q=Galiza. But they include http://www.oxforddictionaries.com/definition/english/galicia?q=Galicia.

In the meantime, Wiktionary has both.

https://en.wiktionary.org/wiki/Galiza#English