Find another word for portentous. In this page you can discover 25 synonyms, antonyms, idiomatic expressions, and related words for portentous, like: ominous, foreboding, prophetic, momentous, rare, extraordinary, significant, important, ominous, sinister and unusual.
His passion for details not only swelled his volumes to a portentous size, but was fatal to artistic construction.
Meanwhile, it is certain that what is strange, new or portentous is regularly treated by all savages as sacred.
In their conceptions a single social imperfection assumed such portentous dimensions that it seemed to overcloud the whole heaven and threaten the world with ruin.
This is said to have hapC, pened in 356 B.C. on the October night on which Alexander the Great came into the world, and, as Hegesias said, the goddess herself was absent, assisting at the birth; but the exactness of this portentous synchronism makes the date suspect.
The Babylonians, according to Berossus, supposed that there were ten antediluvian kings, who they declared had reigned for the portentous period of 432,000 years: 432,000 years, however, it has been ingeniously pointed out by Oppert (Gott.