Bible Dictionaries
Portentous

Webster's Dictionary

(1):

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

(2):

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

Bibliography Information
Webster, Noah. Entry for 'Portentous'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​p/portentous.html. 1828.