Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of portentous is as below...

Prodigious :: Prodigious (a.) Of the nature of a prodigy; marvelous; wonderful; portentous.

Dire :: Dire (superl.) Ill-boding; portentous; as, dire omens..

Bodeful :: Bodeful (a.) Portentous; ominous.

Portentous :: Portentous (a.) Of the nature of a portent; containing portents; foreshadowing, esp. foreshadowing ill; ominous..

Ominous :: Ominous (a.) Of or pertaining to an omen or to omens; being or exhibiting an omen; significant; portentous; -- formerly used both in a favorable and unfavorable sense; now chiefly in the latter; foreboding or foreshowing evil; inauspicious; as, an ominous dread..

Portentous :: Portentous (a.) Hence: Monstrous; prodigious; wonderful; dreadful; as, a beast of portentous size..

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