Not binary; not consisting of or relating to two parts or components.
Relating to a person whose gender identity is other than conventionally male or female.
Of or relating to a system of numeration that does not have 2 as its base.
Octal and hexidecimal number systems are nonbinary.
The definition of nonbinary is when a person doesn't identify as just female or male.
An example of nonbinary is a court decision in Oregon where a judge allowed a person to legally choose neither sex and be classified as nonbinary.