A non-binary lesbian is a non-binary or genderqueer person who is attracted to women or woman aligned people in a sapphic way and identifies as a lesbian. Non-binary lesbians are often- but not necessarily- feminine aligned, woman aligned, girlprox, transfeminine.
It is sometimes also used by neutral, abinary, or unaligned non-binary people. It may also be used by non-binary people who are masculine-aligned but don't experience manhood, or those who experience manhood but in addition to another gender.
Non-binary lesbian can also be an umbrella term that encompasses other identities such as genderfluid lesbian.