Third gender or third sex is the concept that individuals are categorized, either by themselves or by society, as neither man nor woman. It also describes a social category present in those societies that recognize three or more genders. The term third is usually understood to mean "other"; some anthropologists and sociologists have described fourth, fifth, and "some" genders. The concepts of "third", "fourth" and "some" genders can be somewhat difficult to understand within Western conceptual categories.

Third gender or third sex is the concept that individuals are categorized, either by themselves or by society, as neither man nor woman. It also describes a social category present in those societies that recognize three or more genders. The term third is usually understood to mean "other"; some anthropologists and sociologists have described fourth, fifth, and "some" genders. The concepts of "third", "fourth" and "some" genders can be somewhat difficult to understand within Western conceptual categories.