DIACRITIC Meaning of DIACRITIC in English n. & adj.n. a sign (e.g. an accent, diaeresis, cedilla) used to indicate different sounds or values of a letter. adj. = DIACRITICAL. [ Gk diakritikos (as DIA-, CRITIC) ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012