I don't think it really means anything. Gender roles are a social construct... You can be a woman and not ascribe to these roles, so the definition would be pretty broad and abstract.
Most people would define what being a "woman" is by reciting stereotypes... I don't want to fall into that trap...
Honestly, no idea. I'm just me, I had no place in society as a male because I just couldn't fulfill the "role" society expected of me as that... I'm way more comfortable in a female skin, my behaviour and interests are more in line with what society expects of females. It feels right, but I can't really explain why it's right. All I know is I used to hurt inside, and that pain has now subsided...
I can just be, without being made to feel inadequate or out of place... I finally like myself and found a sense of inner peace. The world's no longer ugly, or mean, or cruel... It just is, and I finally just am...
Do I feel like a woman in society? Yes.
What does being a woman mean? I don't know.
But I do believe one can in fact feel gender... I don't really feel my legs when I'm laying down and relaxed, but if someone punched one of my legs, it'd hurt, and I'd feel it. Same thing with gender, you feel it if something's wrong, because it'll hurt...
I really think gender transcends silly stereotypical definitions... It doesn't manifest itself like that. It's not superficial... It is, however, innate, subtle, and obvious only to your own person..