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.
To some, keeping silent would have been tantamount to capitulation, but others have questioned Zelenskyy’s approach. Lena Surzhko Harned, The Conversation, 3 Mar. 2025 Blaming it for costing the state money is tantamount to punching someone in the nose and then suing them for bloodstain damage to the shirt of their assailant. Orlando Sentinel and South Florida Sun Sentinel Editorial Boards, Orlando Sentinel, 28 Feb. 2025 On Sunday’s episode of ABC’s This Week, Republican Rep. Mike Lawler of New York was asked to share his reaction to the email and Musk’s comment that failing to respond would be tantamount to a resignation. Rebecca Schneid, TIME, 23 Feb. 2025 Trying to convince these teens that the goods are not worth stealing seems tantamount to giving up. Judith Martin, The Mercury News, 19 Feb. 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 Mar. 2025.

Kids Definition

tantamount

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

More from Merriam-Webster on tantamount

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