Adjective
1. of momentous or ominous significance;
"such a portentous...monster raised all my curiosity"- Herman Melville"a prodigious vision"2. of ominous significance
3. puffed up with vanity;
"a grandiloquent and boastful manner""overblown oratory""a pompous speech""pseudo-scientific gobbledygook and pontifical hooey"- Newsweek