MARVELLOUS Meaning of MARVELLOUS in English adj. (US marvelous) 1 astonishing. 2 excellent. 3 extremely improbable. marvellously adv. marvellousness n.[ ME f. OF merveillos f. merveille: see MARVEL ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012