A person with an American Serviceman, either Civilian or Military, of ANY ethnicity or nationality for a
father and an
Asian or Pacific islander for a mother; the offspring,
child or direct descendant of such a relationship, whether married or unmarried. Also: in very rare occasions the genders of the parents may be reversed, i.e. the product of an American servicewoman and Asian male.
Literally, American + Asian = Amerasian