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 On the occasion of this momentous anniversary, four Washington Post staffers gathered to discuss the abiding cultural significance — and iconic gags — of one of the greatest television comedies ever. — Maura Judkis, Washington Post, 7 Oct. 2026 The tide began to turn with another momentous California ballot initiative—Proposition 13, in 1978, which severely limited property taxes. — Nicholas Lemann, New Yorker, 4 Oct. 2026 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 See All Example Sentences for momentous

Recent Examples of Synonyms for momentous

Adjective

This stage determines how engineers distribute major systems throughout the submarine.

— Aamir Khollam, Interesting Engineering, 31 Oct. 2026
The InterContinental is also a short walk from a major Gencom project in development.

— Vinod Sreeharsha, Miami Herald, 31 Oct. 2026

Definition of major

Adjective

Helium plays an important role in wind, solar and nuclear energy production, space exploration, medical imaging and research.

— Arkansas Online, Arkansas Online, 24 Oct. 2026
Education and giving back are important values to the family as the project represents for them a broader impact within the natural diamond industry.

— Fairchild Studio, Footwear News, 24 Oct. 2026

Definition of important

Adjective

Organizations often react by utilizing significant resources to address this one issue while other commitments quietly slip through the cracks.

— Rohan Joshi, Forbes.com, 30 Oct. 2026
Detroit’s automakers, particularly GM, were slow to recognize the staying power of hybrids, leaving foreign competitors such as Toyota with a significant advantage.

— The Editorial Board, Chicago Tribune, 30 Oct. 2026

Definition of significant

Adjective

In September 2026 Huang and a few collaborators uploaded a proof that the historic equations represent a single case of a much grander geometrical theory.

— Lyndie Chiou, Scientific American, 29 Oct. 2026
Days out from the historic vote, the race also has become a new venue for the city’s infamously rough-and-tumble politics.

— Chicago Tribune, Chicago Tribune, 28 Oct. 2026

Definition of historic

Adjective

The Lakers went to sleep in the second quarter and started to get cooked by the Warriors, watching their big lead get sliced to 53-53 at the half.

— Broderick Turner, Los Angeles Times, 31 Oct. 2026
Now, having just turned 81 years old, Lula faces his biggest challenge of all.

— The Week UK, TheWeek, 31 Oct. 2026