fiat

noun

fi·​at ˈfē-ət How to pronounce fiat (audio)
-ˌat,
-ˌät;
ˈfī-ət,
-ˌat How to pronounce fiat (audio)
1
: an authoritative or arbitrary order : decree
government by fiat
2
: an authoritative determination : dictate
a fiat of conscience
3
: a command or act of will that creates something without or as if without further effort
According to the Bible, the world was created by fiat.

Examples of fiat in a Sentence

He runs the company by fiat. the school principal issued a fiat that caps were not to be worn inside the school, and that was that
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Coming from someone who helped architect modern digital payments, the statement underscores a generational shift away from fiat rails and toward decentralized value transfer. Sandy Carter, Forbes.com, 28 May 2025 Unlike volatile digital assets like bitcoin, the value of stablecoins is tied to a real-world asset like fiat currencies or commodities like gold. Dylan Butts, CNBC, 22 May 2025 Many stablecoins are also backed by reserves of fiat currency or other assets like U.S. Treasuries. Medora Lee, USA Today, 21 May 2025 Where the very meaning of gender is codified in clothing and hair — facial or flowing — as well as by fiat. Vanessa Friedman, New York Times, 1 May 2025 See All Example Sentences for fiat

Word History

Etymology

Latin, let it be done, 3rd singular present subjunctive of fieri to become, be done — more at be

First Known Use

circa 1631, in the meaning defined at sense 3

Time Traveler
The first known use of fiat was circa 1631

Cite this Entry

“Fiat.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fiat. Accessed 1 Jun. 2025.

Kids Definition

fiat

noun
fi·​at ˈfē-ət How to pronounce fiat (audio) -at How to pronounce fiat (audio)
-ät;
ˈfī-ət,
-at
: an order from someone in charge

Legal Definition

1
: decree
2
: an authoritative but arbitrary order
a brazen act of judicial fiatL. H. Tribe

More from Merriam-Webster on fiat

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