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.

"At first blush, this case may not seem momentous," said Koh from the trade union confederation.

From Barron's • May 21, 2026

In front of nine of the 1982 European Cup heroes - including captain Dennis Mortimer and goalscorer Peter Withe - Villa wrote themselves another momentous chapter.

From BBC • May 20, 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

During a momentous power struggle in 2017, Sutskever and Brockman proposed giving Musk more than half of OpenAI’s equity.

From The Wall Street Journal • May 18, 2026

We looked at each other in disbelief and glanced over at the warders, who seemed unaware that anything momentous had occurred.

From "Long Walk to Freedom" by Nelson Mandela

Vocabulary lists containing momentous

The SAT: Words to Capture Tone, List 3

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The New SAT: Words to Capture Tone

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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!