1. portentous - Adjective
2. portentous - Adjective Satellite
Of the nature of a portent; containing portents; foreshadowing, esp. foreshadowing ill; ominous.
Hence: Monstrous; prodigious; wonderful; dreadful; as, a beast of portentous size.
Source: Webster's dictionarya grandiloquent and boastful manner Source: Internet
overblown oratory Source: Internet
a pompous speech Source: Internet
pseudo-scientific gobbledygook and pontifical hooey Source: Internet
such a portentous...monster raised all my curiosity Source: Internet
a prodigious vision Source: Internet