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
Even casual fans are speculating on the significance of Johansson hosting the final episode of this momentous year.
—Andy Hoglund Updated, EW.com, 18 May 2025
The annual meeting was held on the same day, with further discussion about Berkshire Hathaway’s operations and the momentous announcement of Buffett’s retirement as CEO at the end of the year.
—Bill Stone, Forbes.com, 16 May 2025
While momentous events unfold in the backdrop of most of these eras, the film places us in the perspective of characters who are children or teenagers, and whose accounts are immediate and personal.
—Alison Willmore, Vulture, 14 May 2025
While Boston has long been considered the likely destination for John Cena's final WWE match, new reports reveal the company initiated a significant bidding process for cities to host the momentous farewell.
—Andrew Ravens, MSNBC Newsweek, 12 May 2025
See All Example Sentences for momentous
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Andy Hoglund Updated, EW.com, 18 May 2025
The annual meeting was held on the same day, with further discussion about Berkshire Hathaway’s operations and the momentous announcement of Buffett’s retirement as CEO at the end of the year.
—Bill Stone, Forbes.com, 16 May 2025
While momentous events unfold in the backdrop of most of these eras, the film places us in the perspective of characters who are children or teenagers, and whose accounts are immediate and personal.
—Alison Willmore, Vulture, 14 May 2025
While Boston has long been considered the likely destination for John Cena's final WWE match, new reports reveal the company initiated a significant bidding process for cities to host the momentous farewell.
—Andrew Ravens, MSNBC Newsweek, 12 May 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 29 May. 2025.
Copy CitationKids Definition
momentous
adjective
mo·men·tous
mō-ˈment-əs
: very important
a momentous decision
momentously
adverb
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