mo·​men·​tous | \ mō-ˈmen-təs How to pronounce momentous (audio) , mə- \

Definition of momentous

: having great or lasting importance : consequential, significant a momentous decision a momentous event/occasion The Senate begins a momentous debate on health care today …The New York Times Deydey usually talked about his travels, the places he'd seen and the people, the close calls and momentous encounters with animals, weather, other Anishinabeg, and best of all, ghosts.— Louise Erdrich The late nineteenth century was strewn with inventions. Many were momentous, but few affected men and women more closely than the bicycle and its motorized offspring: motorcycle, motor-car and aeroplane.— Eugen Weber

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Other Words from momentous

momentously adverb
a momentously important decision … a … twist that is executed differently from the comic book story, but is just as dramatically and momentously presented. The Philippines Daily Inquirer
momentousness noun
But other East Europeans had little time to marvel at the momentousness of the moment. Just one day after the fall of the [Berlin] Wall, Bulgaria's dour leader of 35 years, Todor Zhivkov, was ousted. — Stephen E. Deane

Examples of momentous in a Sentence

My college graduation was a momentous day in my life. a momentous occasion that will go down in the history books
Recent Examples on the Web Vanessa Bryant posted a photo of the footwear along with videos of an ecstatic Natalia celebrating the momentous occasion Tuesday on Instagram. Chuck Schilken, Los Angeles Times, "USC-bound Natalia Bryant gets cardinal and gold Kobe sneakers from mother Vanessa," 31 Mar. 2021 On Wednesday, Virginia Gov. Ralph Northam (D) signed legislation to abolish the death penalty — a momentous event in Virginia’s history and in the annals of our criminal system. Washington Post, "Guest post: How Virginia ended the death penalty," 24 Mar. 2021 To help level up the momentous occasion, director Craig Brewer added in a few surprises for returning audiences. Bianca Gracie, Vulture, "How Salt-N-Pepa Brought the Party to Coming 2 America," 17 Mar. 2021 Sunday's Grammys were a momentous occasion for John Legend, whose latest record Bigger Love was awarded Best R&B Album—the third award he's received in that category and his 12th Grammy overall. Emily Dixon, Marie Claire, "Chrissy Teigen Hilariously Called Out John Legend After His Grammy Win," 15 Mar. 2021 Every leader will need to be a technology leader instinctively aware that business and innovation strategies are now indistinguishable and able to fuse the two momentous transformations driving change: technical progress and sustainability. Jean-marc Ollagnier, Forbes, "Business Leaders Must Be The New Futurists," 10 Mar. 2021 For the momentous occasion, Eugenie kept her look natural and neutral. Sarah Midkiff,, "Princess Eugenie’s Padded Velvet Headband Is About To Sell Out," 22 Feb. 2021 Certainly, this fuzzy tribute to their Auntie, who makes history as the first woman to be Vice President of the United States, is a touching sartorial detail for such a momentous occasion. Roxanne Adamiyatt, Town & Country, "Kamala Harris' Great-Nieces, Amara and Leela Ajagu, Wore Matching Coats to Honor Her at the Inauguration," 20 Jan. 2021 Wednesday morning was a momentous occasion as Joe Biden was sworn in as the 46th President of the United States. Carolyn Twersky, Seventeen, "A Look At the Hidden Meanings in Amanda Gorman's Inaugural Poem "The Hill We Climb"," 20 Jan. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'momentous.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of momentous

1631, in the meaning defined above

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Time Traveler for momentous

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The first known use of momentous was in 1631

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Statistics for momentous

Last Updated

12 Apr 2021

Cite this Entry

“Momentous.” Dictionary, Merriam-Webster, Accessed 13 Apr. 2021.

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More Definitions for momentous



English Language Learners Definition of momentous

: very important : having great or lasting importance


mo·​men·​tous | \ mō-ˈmen-təs How to pronounce momentous (audio) \

Kids Definition of momentous

: very important a momentous decision

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