Judges say the "concept of sex is binary" while adding that transgender people will still have protection against discrimination.

LONDON -- The Supreme Court ruled Wednesday that the U.K. equalities law defines a woman as someone born biologically female. Justice Patrick Hodge said five judges at the court had ruled unanimously that “the terms ‘woman’ and ‘sex’ in the Equality Act refer to a biological woman.”

The terms “woman” and “sex” in the Equality Act refer to a biological woman and biological sex, the Supreme Court has ruled. Campaign group For Women Scotland (FWS) brought a series of challenges – including to the UK’s highest court – over the definition of “woman” in Scottish legislation mandating 50% female representation on public boards.