MOMENTOUS Synonyms: 74 Similar and Opposite Words

momentous

adjective

mō-ˈmen-təs

Definition of momentous

as in major

having great meaning or lasting effect a momentous occasion that will go down in the history books

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Example Sentences

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Recent Examples of momentous There, it is made plain that the Atlas marked a momentous shift in the epistemology of the search, one that might already be termed algorithmic. — Artforum, 28 Sep. 2026 Yes, Zodiac is a momentous movie, a masterpiece, and Unabomber is not. — Bilge Ebiri, Vulture, 25 Sep. 2026 To become, in other words, the hero that’s needed to turn this momentous struggle around. — Theater Critic, Los Angeles Times, 17 Sep. 2026 Observers praised the Armani Group for the momentous decision, and see Vitale’s expertise and design prowess as beneficial. — Luisa Zargani, Footwear News, 16 Sep. 2026 See All Example Sentences for momentous

Recent Examples of Synonyms for momentous

Adjective

Despite the hefty reservation payments, the Roadster is unlikely to become a major revenue source for Tesla.

— Bilin Lin, Fortune, 17 Oct. 2026
Her Instagram long-form project Excellences & Perfections, from 2014, however, was major cringe.

— Eugenie Brinkema, ARTnews.com, 17 Oct. 2026

Definition of major

Adjective

Understanding the answer is often more important than the opportunity itself.

— Aneri Jambusaria, Fortune, 18 Oct. 2026
Ties between Ukraine and its most important backer the United States have also been strained by the apparent withdrawal of US intelligence sharing, and restrictions to the Starlink satellite internet service.

— Helen Regan, CNN Money, 17 Oct. 2026

Definition of important

Adjective

Sullivan and Peltola have already faced off this year, but Thursday's debate was widely seen as the most significant for the general electorate.

— Matthew Choi The Washington Post, Arkansas Online, 17 Oct. 2026
That reality makes the latest Carrera T more significant than its understated badge might suggest.

— Bradley Iger, Robb Report, 16 Oct. 2026

Definition of significant

Adjective

Both those historic actions happened as part of the Biden administration's focus on anti-money laundering and efforts to promote compliance with the then-emerging virtual currency industry.

— Arkansas Online, Arkansas Online, 14 Oct. 2026
Yeager's historic flight followed a series of unpowered glide tests, incuding three by Yeager himself in August of 1947, followed by ever faster subsonic powered flights.

— Tariq Malik, Space.com, 14 Oct. 2026

Definition of historic

Adjective

At the end of September, leaders of several of the biggest AI companies went to the White House and signed an accord committing to internal risk controls, independent audits and board-level oversight of safety.

— Giorgos Tsetis, Fortune, 17 Oct. 2026
Go rebound the basketball, go protect the rim, be a big big for us.

— Anthony Chiang, Miami Herald, 17 Oct. 2026