Definition of fiat noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈfiːæt//
; NAmE NAmE//ˈfiːæt//
; BrE BrE//ˈfaɪæt//
; NAmE NAmE//ˈfaɪæt//
[countable, uncountable] (formal)
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an official order given by somebody in authority synonym decree Prices have been fixed by government fiat. Word Originlate Middle English: from Latin, ‘let it be done’, from fieri ‘be done or made’.
See the Oxford Advanced American Dictionary entry: fiat