Seriously, How do you define a Woman of Color?

Every and I mean Every MSM talking head, pundit, hanger on, contributor, etc., has dropped the phrase 1st African American Woman, and it's now "Woman of Color". What does this mean? Does this mean any person of any race or ethnicity is a Person of Color - except for White Caucasians? Kamala Harris has defined her whole political life as an African American woman so why is this not in every MSM talking point?