momentous

[moh-men-tuhs] / moʊˈmɛn təs /

ADJECTIVE

important; serious

Synonyms

STRONGEST

consequential crucial decisive eventful far-reaching fateful historic meaningful memorable notable pivotal significant weighty

WEAK

big chips are down considerable critical earth-shaking earth-shattering epochal grave heavy heavy number material of moment outstanding substantial vital

Antonyms

STRONGEST

inconsequential insignificant meaningless ordinary trivial uneventful unimportant unnoteworthy unremarkable unsubstantial

WEAK

immaterial trifling

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

“Kevin Warsh’s confirmation as the next Federal Reserve Chairman is a momentous step towards finally restoring accountability, competence, and confidence in Fed decision-making,” White House spokesman Kush Desai told Barron’s.

From Barron's • May 22, 2026

“Choo Choo Revue,” the latest in a long line of song-and-dance productions, is arriving at a momentous time for the Bob Baker Marionette Theater.

From Los Angeles Times • May 20, 2026

Some fellow students knew Roberts’ politics but insisted that he didn’t engage in debates about these momentous battles.

From Slate • May 7, 2026

“The plan is momentous because it would be the first internationally enforced decarbonization program,” Ella Baldwin, an energy policy consultant in the Houston office of Rystad Energy, a Norwegian research firm, says in an interview.

From The Wall Street Journal • Apr. 20, 2026

The son of Grace and Ernest Turner, the daughter of Emily and Jack Tallis, the childhood friends, the university acquaintances, in a state of expansive, tranquil joy, confronted the momentous change they had achieved.

From "Atonement" by Ian McEwan

Vocabulary lists containing momentous

The SAT: Words to Capture Tone, List 3

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!

The New SAT: Words to Capture Tone

Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!

100 SAT Words Beginning with "M"

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!