Meanings
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1
adj
of momentous or ominous significance
Such a portentous...monster raised all my curiosity- Herman Melville.
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2
adj
Of momentous or ominous significance.
Well may it sort [be fitting] that this portentous figure comes armed through our watch, so like the King that was and is the question of these wars.
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3
adj
puffed up with vanity
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4
adj
ominously prophetic
Thesaurus
Synonyms
1
adj
· of momentous or ominous...
prodigious
2
adj
· of momentous or ominous...
bigcentralconsequentialcriticalcrucialepochfulessentialextraordinary
3
adj
· puffed up with vanity
overblown
4
adj
· ominously prophetic
fateful
Opposites
Word family
Forms
portentously
Derived forms
portentouslyportentousnessunportentous
Etymology
Of multiple origins: * Borrowed from Latin portentōsus, from portentus (“predicted”) + -ōsus. Compare earlier portentuous (via Middle English from Latin portentuōsus). By surface analysis, portent + -ous. * Borrowed from French portentueux