Meaning of “fiat” in the English Dictionary

british dictionary

"fiat" in British English

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fiatnoun [ C or U ]

uk /ˈfiː.æt/ us /ˈfiː.æt/ formal

an order given by a person in authority:

No company can set industry standards by fiat.

(Definition of “fiat” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"fiat" in American English

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fiatnoun [ U ]

us /ˈfi·æt, -ɑt, -ət/ fml

the giving of orders by someone who has complete authority:

The general ruled by fiat for eight years after seizing power.

(Definition of “fiat” from the Cambridge Academic Content Dictionary © Cambridge University Press)