Meta-ethnicity
Meta-ethnicity is a relatively recent term (or neologism) occasionally used in academic literature or public discourse on ethnic studies. It describes a claimed level of commonality that is wider ("meta-") and more general (i.e., might differ on specifics) than ethnicity. In colloquial discourse, it usually signifies a larger group of related ethnic groups who identify with each other.
As such, the definition of meta-ethnicity depends on the definition of ethnicity.
Wikipedia states Hinduism, Hispanics, and Chinese people as claimed examples in politically correct sources.