portentous

[pawr-ten-tuhs, pohr-]
adjective
1.
of the nature of a portent; momentous.
2.
ominously significant or indicative: a portentous defeat.
3.
marvelous; amazing; prodigious.

Origin:
1530–40; < Latin portentōsus. See portent, -ous

portentously, adverb
portentousness, noun
nonportentous, adjective
nonportentously, adverb
nonportentousness, noun
unportentous, adjective
unportentously, adverb
unportentousness, noun

portentous, pretentious.


1, 2. See ominous. 2. unpropitious, inauspicious, threatening.
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World English Dictionary
portentous (pɔːˈtɛntəs)
 
adj
1.  of momentous or ominous significance
2.  miraculous, amazing, or awe-inspiring; prodigious
3.  self-important or pompous
 
por'tentously
 
adv
 
por'tentousness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

portentous
1530s, from L. portentosus, from portentem (see portend).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Certainly, someone has arranged the film's time frame portentously enough to add extra heft to its slender story.
He does not mean that the director was chuckling ironically or darkly or portentously.
Woodwinds murmur and percussion rattles portentously as the sun inches over the horizon.
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