Dictionary and Thesaurus

Definition of Portentous

• (a.) Of the nature of a portent; containing portents; foreshadowing, esp. foreshadowing ill; ominous.
• (a.) Hence: Monstrous; prodigious; wonderful; dreadful; as, a beast of portentous size.

Synonyms of Portentous

• Prodigious
• Fateful
• Foreboding
• Grandiloquent
• Overblown
• Pompous
• Pontifical

Antonyms of Portentous

Homophones of Portentous