FAD Meaning of FAD in English n. 1 a craze. 2 a peculiar notion or idiosyncrasy. faddish adj. faddishly adv. faddishness n. faddism n. faddist n.[ 19th c. (orig. dial.): prob. f. fidfad f. FIDDLE-FADDLE ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012