fiat

noun

fi·​at ˈfē-ət How to pronounce fiat (audio)
-ˌat
-ˌät;
ˈfī-ət
-ˌat How to pronounce fiat (audio)
Synonyms of fiat
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.
Bitcoin is by far the largest crypto token by market capitalization, and its proponents frequently tout it as a form of digital gold that can serve as a hedge against inflation-prone fiat currencies. Jack Kubinec, Fortune, 26 May 2026 Converting crypto into usable fiat (money and currencies issued by governments) had been marketed as instant and borderless. Amy Guttman, Forbes.com, 20 May 2026 Anthropic is suing the Defense Department and the relevant federal agencies to undo the fiats. Jared Perlo, NBC news, 29 Apr. 2026 Plus, this digital fiat currency has the price certainty of a traditional bank account. Malana Vantyler, Miami Herald, 29 Apr. 2026 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 29 May. 2026.

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

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