It's not squishy, and it's not hard. Woman means adult female human, and female means someone that produces the larger of two gamete sizes. That's the real, literal biological definition.

Since I'm rate limited, to be slightly more specific, it's the gamete size one would or should produce. I elided that part but biologists are well aware of disorders of development.

Another edit: This has nothing to do with religion or any sort of intelligent design woo. Read "should" as "would if it were mature and healthy".