momentous
adjective
mo·men·tous
mō-ˈmen-təs 
mə-
: 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
The New York TimesDeydey 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
Louise ErdrichThe 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
Eugen Weber
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
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
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
The video was shot in the city on Tuesday following a momentous meet-up in the park that was shut down by the NYPD.
—Maya Georgi, Rolling Stone, 24 Apr. 2025
Just in time for the momentous occasion, adidas Football is getting in on the action.
—Kimberly Wilson, Essence, 23 Apr. 2025
The 65-year-old actor revealed the timing of both momentous occasions to his former costars, Jodie Sweetin and Andrea Barber, on the Friday, April 18, episode of their podcast, How Rude, Tanneritos!
—Charna Flam, People.com, 22 Apr. 2025
He’s lent his signature urgent, momentous vocals to tracks by Massive Attack, Leftfield and Run the Jewels, and even found time to hook up with Faith No More and Mr. Bungle mastermind Mike Patton and Doseone in the supergroup Nevermen.
—Cat Woods, Los Angeles Times, 21 Apr. 2025
See All Example Sentences for momentous
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Maya Georgi, Rolling Stone, 24 Apr. 2025
Just in time for the momentous occasion, adidas Football is getting in on the action.
—Kimberly Wilson, Essence, 23 Apr. 2025
The 65-year-old actor revealed the timing of both momentous occasions to his former costars, Jodie Sweetin and Andrea Barber, on the Friday, April 18, episode of their podcast, How Rude, Tanneritos!
—Charna Flam, People.com, 22 Apr. 2025
He’s lent his signature urgent, momentous vocals to tracks by Massive Attack, Leftfield and Run the Jewels, and even found time to hook up with Faith No More and Mr. Bungle mastermind Mike Patton and Doseone in the supergroup Nevermen.
—Cat Woods, Los Angeles Times, 21 Apr. 2025
See All Example Sentences for momentous
Cite this Entry
“Momentous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/momentous. Accessed 5 May. 2025.
Copy CitationKids Definition
momentous
adjective
mo·men·tous
mō-ˈment-əs
: very important
a momentous decision
momentously
adverb
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