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.

"We're gathered at a momentous time of uncertainty, of chaos and instability," said Jamey Rosenfield, founder and co-chair of CERAWeek, during the closing event on Friday.

From Barron's • Mar. 27, 2026

These momentous shifts partly explain how the U.S. economy easily withstood a surge in oil prices following the Russian invasion of Ukraine in 2022.

From MarketWatch • Mar. 21, 2026

Going overboard on the momentous nature of this contest is not a smart play.

From BBC • Mar. 13, 2026

Mr. Scott charts a course through these momentous events with great skill, producing a book that is readable and accessible but bedded in authoritative scholarship.

From The Wall Street Journal • Mar. 8, 2026

Either way, discovering your name prophecy was a momentous occasion, even if it happened at the time of your death.

From "Witchlings" by Claribel A. Ortega

Vocabulary lists containing momentous

The SAT: Words to Capture Tone, List 3

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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!