as in major
having great meaning or lasting effect
a momentous occasion that will go down in the history books
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Recent Examples of momentous
Evaluating extraordinary claims Detecting extraterrestrial life in any form would be a momentous occasion, so, as Impey wrote, making a declaration might not be cut-and-dried.
—
Mary Magnuson, The Conversation, 20 Mar. 2026
Sunday's win for Jordan feels even more momentous given a particularly egregious moment that happened earlier in late February.
—Nick Romano, Entertainment Weekly, 16 Mar. 2026
America will celebrate not just one, but two momentous anniversaries this year.
—John F. Crowley, STAT, 12 Mar. 2026
The artist kicked off 2023 with a momentous debut at the Coachella Music Festival, a hometown glory story told through a billboard that went viral, and the mayor of Desert Hot Springs bestowing the keys to his hometown.
—Matt Grobar, Deadline, 6 Mar. 2026
See All Example Sentences for momentous
Mary Magnuson, The Conversation, 20 Mar. 2026
Sunday's win for Jordan feels even more momentous given a particularly egregious moment that happened earlier in late February.
—Nick Romano, Entertainment Weekly, 16 Mar. 2026
America will celebrate not just one, but two momentous anniversaries this year.
—John F. Crowley, STAT, 12 Mar. 2026
The artist kicked off 2023 with a momentous debut at the Coachella Music Festival, a hometown glory story told through a billboard that went viral, and the mayor of Desert Hot Springs bestowing the keys to his hometown.
—Matt Grobar, Deadline, 6 Mar. 2026
See All Example Sentences for momentous
Recent Examples of Synonyms for momentous
Adjective
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Here's your daily look at traffic on major highways in the Kansas City area.—
Kansas City Star,
Kansas City Star,
27 Mar. 2026
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Being honest with yourself before making major purchases should protect your long-term stability.—
Tarot.com,
Hartford Courant,
27 Mar. 2026
Adjective
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The Shah’s Western orientation extended to culture, and a wide range of artistically important international films could be seen in Tehran, in time including those of the French New Wave.—
Richard Brody,
New Yorker,
27 Mar. 2026
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Past wars have not been dictated by the operating hours of the NYSE, but in this presidential worldview, there is no more important constraint.—
Jeffrey Sonnenfeld,
Fortune,
26 Mar. 2026
Adjective
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Robots learn faster The GAE model marks a significant step forward in motion intelligence for humanoid and service robots, enabling machines to learn physical tasks more naturally and efficiently.—
Jijo Malayil,
Interesting Engineering,
24 Mar. 2026
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For many in South Florida, the possibility of compensation remains uncertain — with major questions lingering over eligibility, funding, and whether any agreement would require significant political concessions.—
Ivan Taylor,
CBS News,
24 Mar. 2026
Adjective
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The historic building was built in 1904.—
Brayden Garcia,
Fort Worth Star-Telegram,
28 Mar. 2026
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But Friday’s matchup brought back memories from last season’s first-round playoff series between the two teams that ended in historic humilation for the Heat.—
Anthony Chiang,
Miami Herald,
28 Mar. 2026
Adjective
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That's one of the biggest concerns for individuals who live in this area.—
Jeramie Bizzle,
CBS News,
25 Mar. 2026
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The rooms The rooms can best be described as minimalist but memorable, with a big emphasis on mood lighting, earth-toned velvet furniture, and photo-worthy vanity areas.—
Condé Nast,
Condé Nast Traveler,
25 Mar. 2026
Cite this Entry
“Momentous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/momentous. Accessed 30 Mar. 2026.
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