from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Of utmost importance; of outstanding significance or consequence: a momentous occasion; a momentous decision.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. outstanding in importance
  • adj. of unparalleled significance

from the GNU version of the Collaborative International Dictionary of English

  • adj. Of moment or consequence; very important; weighty

from The Century Dictionary and Cyclopedia

  • Of moment or consequence; of surpassing importance; critical.
  • Synonyms Grave, serious.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. of very great significance


Sorry, no etymologies found.


  • The Australian prime minister also noted what she called the "momentous" upheaval in the Middle East, and pledged her alliance with the United States in condemning Iran's nuclear program, and in a call for an Israeli-Palestinian resolution.

    Australian PM 'Stand Firms' Behind US-Afghan War Strategy

  • The Federal Communications Commission is holding what it described as a momentous meeting on the Open Internet beginning at 10:30AM ET Tuesday morning.

    Watch The FCC's Historic Net Neutrality Meeting Live

  • After that San Rafael night, Dylan makes what he describes as the momentous shift from 2 to 3.

    Dylan Brings It Home: Memoir Is a Ballad to the Beat Village

  • Speaking after her inauguration, Otunbayeva, 59, hailed what she described as a momentous new era for Kyrgyzstan, which has endured months ofpolitical and ethnic violence since former

    WISTV - Local News RSS

  • Speaking after her inauguration, Otunbayeva, 59, hailed what she described as a momentous new era for Kyrgyzstan, which has endured months of political and ethnic violence since former stories

  • I don't think Octavian Nothing is for everybody, but I do think it's YA -- the story of an adolescent finding himself, the story of a young person caught up in momentous events ... what's not YA?

    Fanfare 2006

  • This pattern is especially alarming because if he gets on the Supreme Court, Alito will be taking part in momentous decisions regarding the scope of executive authority in national security matters - cases like those involving "enemy combatants" and detainees and surveillance in what's called the war against terror.


  • Thus, although Easy's search for a young man who has run away to join the militant Urban Revolutionary Party may keep us turning pages, more momentous is what Easy's investigation reveals about the black community's struggle for autonomy and dignity — a struggle mirrored in the detective's life as well.

    A Grand Contrivance

  • Conversely, the Nazis rejected and even reviled socialist cultural and historical traditions such as the celebration of the French Revolution and the 1848 Revolutions or the lore of workers 'struggles in momentous strikes and protests.


  • Nay, we passed out of it into the same summer parlor, where – I cannot tell if John ever knew of the incident, at all events he never mentioned it to me – there had been transacted a certain momentous event in Ursula's life and mine.

    John Halifax, Gentleman


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