Most of the world thinks it refers to physical properties of the body - most commonly, external genitalia - without ever referencing the function (or intended function) of sexed physical properties.
Still never referencing this checklist against the phenomenon underpinning the *reason we have sexed bodies in the first place*.
If you found out I was XXX..
If you found out I was high T...
If, due to injury or disease, my external genitalia was altered radically...
...would I cease to be a typical female?
But it is not the ‘female’ word that ceases to apply, it is the ‘typical’ modifier.
Unless you are willing to call me ‘not female’ because I Lose My Vagina In An Accident (TM).
In short, you could strip away every part of my body and have my gonads living in a dish, and I would *still be female and, with some assistance, still be able to sexually reproduce as a female*.
Probably no longer ‘I’ though :)
My genitalia and secondary characteristics have developed to help those large gametes get fertilised.
Sex centres on gametes.