tantamount

adjective

tan·​ta·​mount ˈtan-tə-ˌmau̇nt How to pronounce tantamount (audio)
: equivalent in value, significance, or effect
a relationship tantamount to marriage

Did you know?

Although tantamount (from the Anglo-French phrase tant amunter, meaning “to amount to as much”) was used three different ways in the early 17th century—as a noun, verb, and adjective—the adjective form has since proven paramount to English users: it’s still in use while the noun and verb are obsolete. This is not to say that the adjective hasn’t experienced change over the years. While it was once acceptable to use tantamount in a variety of different sentence structures, nowadays it is almost always followed by the word to. And to use it before a noun, as in “the two old friends exchanged tantamount greetings,” would now be considered, er, tantamount to riding a penny-farthing or boneshaker onto the expressway.

Examples of tantamount in a Sentence

His statement was tantamount to an admission of guilt. They see any criticism of the President as tantamount to treason.
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.
The abuse of tariffs by the United States is tantamount to depriving countries, especially those in the Global South, of their right to development. John W. Dean, MSNBC Newsweek, 7 Apr. 2025 That revelation, the defense argued, was tantamount to acquittal and thus to try Read again on those charges would be a violation of her constitutional right to Double Jeopardy protections. Flint McColgan, Boston Herald, 3 Apr. 2025 Taking us out of the equation would water down and compromise the world’s ability to fight disease, and would be tantamount to compromising yourselves. Alice Park, Time, 2 Apr. 2025 Image In a state dominated by Democrats, with nominations tantamount to election, Mr. Johnston ran for governor in 1971 but narrowly lost the nomination to Representative Edwin Edwards, who went on to win the first of his four terms as governor. Robert D. McFadden, New York Times, 26 Mar. 2025 See All Example Sentences for tantamount

Word History

Etymology

obsolete tantamount, noun, equivalent, from Anglo-French tant amunter to amount to as much

First Known Use

1641, in the meaning defined above

Time Traveler
The first known use of tantamount was in 1641

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Cite this Entry

“Tantamount.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tantamount. Accessed 13 Apr. 2025.

Kids Definition

tantamount

adjective
tan·​ta·​mount ˈtant-ə-ˌmau̇nt How to pronounce tantamount (audio)
: equal in value, meaning, or effect

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