Maybe it’s those two old crony aunts held them out to the water front. Queer Mrs Quickenough and odd Miss Doddpebble.
S is a woman if and only if:
S is systematically subordinated along some dimension (economic, legal, political, social, etc) and S is ‘marked’ as a target for this treatment by observed or imagined bodily features presumed to be evidence of a female’s biological role in reproduction.
To be a woman is to be subordinated in some way because of real or imagined biological features that are meant to indicate one’s female role in reproduction.