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 Still, that’s a pretty momentous thing to show on screen for this character. — Dalton Ross, Entertainment Weekly, 17 Aug. 2026 White House officials said the orders would prevent a large number of children from receiving birthright citizenship, hailing it as momentous. — Kevin Rector, Los Angeles Times, 7 Aug. 2026 So Flight 14 could be momentous, provided SpaceX gets permission from regulators to make an attempt. — Mike Wall, Space.com, 4 Aug. 2026 And this being France’s national flag carrier, meal time is its own momentous event. — Jessica Puckett, Condé Nast Traveler, 1 Aug. 2026 See All Example Sentences for momentous

Recent Examples of Synonyms for momentous

Adjective

Applying high-temperature treatment to large magnet components, however, would present major engineering challenges.

— Aamir Khollam, Interesting Engineering, 5 Sep. 2026
The Italian supermodel attended this major film event wearing a dress from the Chanel Cruise 2026–2027 collection.

— Giacomo Aricò, Vogue, 5 Sep. 2026

Definition of major

Adjective

Steve Russell, vice president and general manager of Edison Works at GE Aerospace, said accelerating this type of testing is important for developing next-gen capabilities.

— Bojan Stojkovski, Interesting Engineering, 6 Sep. 2026
Turn on account alerts for purchases, transfers, password changes and other important activity.

— Kurt Knutsson, FOXNews.com, 5 Sep. 2026

Definition of important

Adjective

Claiming the 29-year-old Robert would require a more significant financial commitment than Sewald.

— Mitch Bannon, New York Times, 31 Aug. 2026
The advanced weapon features AV’s 20kW-class LOCUST LWS integrated on the General Motors Defense Infantry Squad Vehicle (ISV) platform–a significant advancement in mobile, frontline C-UAS capabilities.

— Prabhat Ranjan Mishra, Interesting Engineering, 30 Aug. 2026

Definition of significant

Adjective

The Permanent Court of Arbitration (PCA) in the Hague on Monday ruled in Pakistan's favor over the 1960 Indus Water Treaty, saying the historic pact remains fully binding and that India had no valid grounds for ending or suspending it.

— Anniek Bao, CNBC, 2 Sep. 2026
This design is directly inspired by a historic Leroy tact watch created in 1810, today preserved at the Patek Philippe Museum.

— Carol Besler, Robb Report, 2 Sep. 2026