'non-binary' originates from the prefix 'non-' meaning 'not' and the word 'binary,' which comes from Latin 'binarius,' meaning 'consisting of two.'

'non-binary' evolved from the concept of 'binary' in gender discussions, emphasizing identities outside the traditional male-female dichotomy.

Initially, it referred to anything not involving two parts, but now it is widely used to describe gender identities beyond male and female.