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

mo·men′tous·ly adv.
mo·men′tous·ness n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adv.1.momentously - in a momentous waymomentously - in a momentous way      
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
بأهَمِّيَّةٍ بالِغَه
á afdrifaríkan hátt
önemli olarak


(ˈməumənt) noun
1. a very short space of time. I'll be ready in a moment; after a few moments' silence.
2. a particular point in time. At that moment, the telephone rang.
ˈmomentary adjective
lasting for only a moment. a momentary feeling of fear.
ˈmomentarily ((American) moumənˈte-) adverb
moˈmentous (-ˈmen-) adjective
of great importance. a momentous event.
moˈmentously adverb
at the moment
at this particular time; now. She's rather busy at the moment.
the moment (that)
exactly when. I want to see him the moment he arrives.
Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.
References in periodicals archive ?
literatures of the world contain nothing so momentously said as that
The phone hacking scandal is greeted with consternation by everyone as if it is momentously surprising.
It follows, therefore, that great works of general strategic theory in principle can have equal value for today and tomorrow and can be written at any location and at any of history's many moments, those both allegedly momentously "strategic" and those that plainly are much less plausibly so.
That 1985 production--which momentously involved the American stage in an act of public reclamation by recasting the notoriously skewed trial of Dan White--had been alienating to at least some members of the Moscone family, as Taccone later learned.
The price hike in key components and raw materials has momentously eroded the manufacturers' gross profit margin.
Malone adduces instances of the country coming to the business, most momentously the case of Texas fiddler Eck Robertson, who in 1922jaunted up to New York City from a gig at a Confederate soldiers' reunion in Virginia, insisted on recording, and set down his still-astonishing, 14-variation "Sally Gooden," considered the first recorded country-music song.
to execute such an iconic project in Saudi Arabia which substantiates our continuous effort to further expand and momentously grow in
"We are delighted to have been selected to execute such an iconic project in Saudi Arabia which substantiates our continuous effort to further expand and momentously grow in this promising country," DSI CEO Khaldoun Tabari said in an e-mailed statement to Khaleej Times.
The last contribution of Innocent III prior to the battle came not in more letters to Spain or elsewhere but in the famous and momentously significant Supplicatio generalis, the call for a general procession in Rome on 16th May, the Wednesday after Pentecost, the time when the pope believed the campaign would begin (95).
In judging the end-result of a religious school (the most predominant alternative education school system of his time), Mann asserted that the education of the young to be good citizens was so momentously important a task that it could not be left to the negligence of the mere individual, but had to be carried out by the more rigorous and accountable state.
Momentously, though, in his third year in the trade in 1993, he won a National Coopers Federation competition against a handful of whisky apprentices.