What is a woman?

If i were to put this question not more than 25 years ago when i was a very young adult, just finishing my teenage times, people would have looked at me strangely,, like i am a kind of a lunatic!
But, today, many struggle to define what a woman is! It seems that feelings now for these people, will be the factor that will decide even their gender!
They say, if you feel you are a woman, even though you were born a man, you must be a woman! And also, goes the other way around!
Lets look again at the Bible and see what a woman is according to the Word of God

Gen 2:23: And Adam said, This is now bone of my bones, and flesh of my flesh: she shall be called Woman, because she was taken out of Man.