ABO Meaning of ABO in English /ab"oh/ , n. , pl. abos , adj. ( sometimes cap. ) Australian Disparaging and Offensive.n.1. an Aborigine. adj.2. aboriginal. [ 1905-10; by shortening; see -O ] Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012