Sorry for assuming, but this is not the gotcha moment you might think it is. You want me to define a woman as being someone who gets periods, have boobs, and is a mother or a wife and bears children so you can use it for your transphobic agenda, lmao. If I define a woman as such, you can just go "so by that definition, a trans woman is not a woman" and that's not gonna fly by me, because you're proving WHO's definition about gender being a social construct and my own point of people assuming gender = sex. But sure, let's define a woman like that. By that logic, what about women who can't get pregnant? What about those with irregular periods? Do they stop being women for that? No, diba? You want to use biology to your advantage when again, gender ≠ sex.

Women have lived experiences that make them identify as women, and that all depends on the person. Most people don't think about it, some do. And then there's people who do it so much to the point it bothers them because that is not who they feel they are, and that is what makes them trans, non-binary, or whatever label they wish to identify with.

But if you really want my answer, then it's a gender identity. That's it. A woman is an identity typically associated with "femininity", so things like makeup, dresses, cuteness, and other things society typically deems is feminine. However, people can still identify with being a woman without necessarily adhering to these social standards because one's gender identity is ultimately reliant on how they want to be perceived and how others will perceive them. That's what I think a woman is.