mo·men·tous | \ mō-ˈmen-təs , mə- \

Definition of momentous 

: important, consequential a momentous decision a momentous event

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Other words from momentous

momentously adverb
momentousness noun

Examples of momentous in a Sentence

My college graduation was a momentous day in my life. a momentous occasion that will go down in the history books

Recent Examples on the Web

No one had seen this momentous decision coming, particularly in a case where the majority merely upheld the decision by the Maryland Court of Appeals. Longreads, "The Bungled Bank Robbery That Ended in a Landmark Legal Ruling," 26 June 2018 One of the striking facts about this momentous decision was that it was made with no process. Elizabeth Drew, The New Republic, "America Gets it Wrong on Iran—Again," 11 May 2018 Good morning, President Trump’s decision to walk away from the Iranian nuclear accord marks a momentous foreign-policy decision that could have significant consequences and reorder American diplomacy. Gerard Baker, WSJ, "The 10-Point.," 9 May 2018 Both Juventus and Real fans will be holding their breaths over the next two days as a decision either way could prove to be momentous for both club's ambitions next season., "'Significant Developments' Expected in Cristiano Ronaldo Transfer Saga in Next 48 Hours," 10 July 2018 Their viciousness kicked off a series of events that tarnished Hawkins’ momentous achievement and led even today to criticism of the civil rights leader. Lauren Ritchie,, "Lake County owes Virgil Hawkins recognition and a thank you for role in civil rights struggle," 12 July 2018 Some of the court’s reversals are more momentous than others, of course. Matt Ford, The New Republic, "How the Supreme Court Kills Roe v. Wade," 11 July 2018 The president will announce his Supreme Court pick tonight around 6 p.m. our time, likely setting up a momentous confirmation vote in the divided Senate just weeks before the midterm election. Morning Brief, The Seattle Times, "A station could be making firefighters sick, Sue Bird makes history and more rescues from the Thai cave | Monday Morning Brief, July 9," 9 July 2018 These momentous shifts in the way Americans work have generated a lot of new research on the health effects of remote jobs and self-employment. Markham Heid, Time, "Is Working Remotely Bad for Your Health?," 9 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'momentous.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of momentous

1656, in the meaning defined above

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Statistics for momentous

Last Updated

19 Sep 2018

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Time Traveler for momentous

The first known use of momentous was in 1656

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More Definitions for momentous



English Language Learners Definition of momentous

: very important : having great or lasting importance


mo·men·tous | \ mō-ˈmen-təs \

Kids Definition of momentous

: very important a momentous decision

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