All 18 Uses

gender
in
The Hammer of Thor
(Auto-generated)

The goat-killer's loose black clothes and metal war helmet made it impossible to guess his or her gender, but I decided to keep thinking of him as male for now.†
p. 15.9

gender = male, female, or any of many trans categories
I'm gender fluid and transgender, idiot.†
p. 54.9
The gender thing wasn't what surprised me.†
p. 55.1
A huge percentage of the homeless teens I'd met had been assigned one gender at birth but identified as another, or they felt like the whole boy/girl binary didn't apply to them.†
p. 55.2
Gender-fluid people are hardly a new thing, Magnus.†
p. 79.8
She's gender fluid.†
p. 93.4
She thought that if she became an einherji, she'd be stuck in one gender forever.†
p. 93.5
I'd been stuck in one gender my whole life.†
p. 93.6
His wardrobe wasn't gender specific.†
p. 239.6
And my gender hasn't changed, thanks for asking.†
p. 239.9
Change gender by force of will?†
p. 271.9
As long as you don't ask me to represent every gender-fluid person for you, okay?†
p. 272.1
But my actual gender?†
p. 272.5
Like my parent, I'm gender fluid.†
p. 367.4
"Well," he said at last, "I still don't trust an argr to do this job—" "A gender-fluid person," Alex corrected.†
p. 368.1 *
"A gender ...whatever you said," Thor amended.†
p. 368.1
I'm going to fix this chariot so our gender argr bride can use it tomorrow.†
p. 371.7
At first I wondered if it had just been a throwaway comment—a non-gender-specific dude.†
p. 448.7

Definitions:

(1) (gender as in: gender discrimination)
male or female

or (especially regarding self-identification): the state of being male, female, or in any of many trans categories

While the word sex can almost always be substituted for this meaning of gender, gender is typically used in reference to cultural or social differences, while sex is typically used for biological differences.
(2) (meaning too rare to warrant focus)
Less commonly, gender can refer to a grammatical categories. In some languages (not modern English), nouns that are not distinguishable by biological sex, can still have a feminine or masculine gender.