OBLIVIOUS Meaning of OBLIVIOUS in English adj.1 (often foll. by of) forgetful, unmindful. 2 (foll. by to, of) unaware or unconscious of. Derivatives: obliviously adv. obliviousness n. Etymology: ME f. L obliviosus (as OBLIVION) Oxford English vocab. Оксфордский английский словарь. 2012