not relating to, composed of, or involving just two things

Aristotelian ontology is non-binary on the second level in that it allows for degrees of being

denoting, having, or relating to a gender identity that does not conform to traditional binary beliefs about gender, which indicate that all individuals are exclusively either male or female

the novelist identifies as non-binary

non-binary people are vastly under-represented in the media

relating to, using, or denoting a system of numerical notation that does not have 2 as a base

the enumeration data is stored in a non-binary format