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Thesaurus: portentous

Of the nature of a portent; containing portents; foreshadowing, esp. foreshadowing ill; ominous.

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  1. a. Of the nature of a portent; containing portents; foreshadowing, esp. foreshadowing ill; ominous.
  2. a. Hence: Monstrous; prodigious; wonderful; dreadful; as, a beast of portentous size.
  3. adj. of momentous or ominous significance
  4. adj. ominously prophetic
  5. adj. puffed up with vanity
  6. 1. Of the nature of a portent; containing portents; foreschadowing, esp. foreschadowing ill; ominous. For, I believe, they are portentous things. Shak. Victories of strange and almost portentous splendor. Macaulay. 2. Hence: Monstrous; prodigious; wonderful; dreadful; as, a beast of portentous size. Roscommon. -- Por*tent"ous*ly, adv. -- Por*tent"ous*ness, n.
  7. j:100 s. of momentous or ominous significance