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momentous

[moh-men-tuhs]
adjective
  1. of great or far-reaching importance or consequence: a momentous day.
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Origin of momentous

First recorded in 1645–55; moment + -ous
Related formsmo·men·tous·ly, adverbmo·men·tous·ness, nounun·mo·men·tous, adjectiveun·mo·men·tous·ly, adverbun·mo·men·tous·ness, noun

Synonyms for momentous

Antonyms for momentous

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for momentously

Historical Examples of momentously

  • He was momentously deciding between the emperor and Hoshiko.

    The Way of the Gods

    John Luther Long

  • It is rather the reawakening of an old temper to which England's history has so often and so momentously given expression.

  • Cantelupe stands up, so momentously that Horsham's gentle flow of speech dries up.

    Waste

    Granville Barker

  • He always spoke respectfully of Effie, and as if momentously impressed with a sense of duty towards her.

  • Thus arose the momentously important mediæval institutions of the Common Land, owned side by side with private land.


British Dictionary definitions for momentously

momentous

adjective
  1. of great significance
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Derived Formsmomentously, adverbmomentousness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for momentously

momentous

adj.

1650s, from moment + -ous to carry the sense of "important" while momentary kept the meaning "of an instant of time." Related: Momentously; momentousness.

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Online Etymology Dictionary, © 2010 Douglas Harper