My definition of what makes someone a woman, are mainly biological, There is the XX genes, and the primary and secondary sex characteristics, like breasts, a vagina, a womb, periods. lack of facial hair, higher voices, wider hips and smaller stature, and hormone surges during puberty.
Being a woman does link into hormones as well, with mood swings, menopause, pregnancy etc
But then again hormones also affect boys and men, with the rarely known theory that boys have a testosterone surge at about 3 or 4, which could be why boys are more energetic as young children, as they are trying to cope with a testosterone surge, and girls are calmer and better at early social skills and fine motor skills at a younger age.
Then hormones must affect girls and boys at secondary school age.... with periods, more facial hair etc etc.....
I just cannot see how we can ignore all this basic biology......