por·ten·tous

[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

por·ten·tous·ly, adverb
por·ten·tous·ness, noun
non·por·ten·tous, adjective
non·por·ten·tous·ly, adverb
non·por·ten·tous·ness, noun
un·por·ten·tous, adjective
un·por·ten·tous·ly, adverb
un·por·ten·tous·ness, noun

portentous, pretentious.


1, 2. See ominous. 2. unpropitious, inauspicious, threatening.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To portentous
00:10
Portentous is always a great word to know.
So is callithumpian. Does it mean:
a chattering or flighty, light-headed person.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
Collins
World English Dictionary
portentous (pɔːˈtɛntəs) [Click for IPA pronunciation guide]
 
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
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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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
It's a portentous spot, itself reason enough for a trip to the other side of
  the world.
The conspiracy theory assigns portentous, sinister meanings to what are most
  likely innocuous, insignificant events.
The occasional lapses into portentous symbolism are inadvertently hilarious.
Such a portentous and mysterious monster roused all my curiosity.
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