OSLO Meaning of OSLO in English /oz"loh, os"-/ ; Norw. /oos"loo/ , n.a seaport in and the capital of Norway, in the SE part, at the head of Oslo Fiord. 463,022. Formerly, Christiania . Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012