Part of speech:
Of, belonging to, or characteristic of a prophet or prophecy:
Unusually good; excellent
Not according to the usual custom or regular plan
Having or expressing a meaning:
Causing excitement or agitation; stirring, thrilling, etc.
(Archaic) Deviating greatly from the norm in appearance or structure; abnormal.
Characterized by exaggerated stateliness; pretentious, as in speech or manner; self-important
Showing or betraying an attitude of superiority:
Of great size, power, extent, etc.; enormous; huge
Of great consequence; serious or momentous:
Of or constituting a culminating or decisive event, turning point, etc., esp. one that is unsettling or threatening
Portending harm; ominous.
Warning of or having dreadful or terrible consequences; calamitous:
Foreshadowing evil or disaster; ominous.
Bringing death or disaster; fatal.
Characterized by an impassioned emphasis on damnation and eternal punishment
Requiring serious thought; important; weighty
Portending future disaster
Not lucky; having, attended with, bringing, or involving bad luck; unfortunate, ill-fated, or ill-omened
Using high-flown, pompous, bombastic words and expressions
Having the pomp, dignity, or dogmatism of a pontiff; sometimes, specif., arrogant or haughty
Find another word for portentous. In this page you can discover 33 synonyms, antonyms, idiomatic expressions, and related words for portentous, like: ominous, foreboding, prophetic, momentous, rare, extraordinary, significant, important, sinister, unusual and exciting.