portentous
adjective
1. of momentous or great significance
- such a portentous moment raised all my curiosity
Similar word(s): important, significant, prodigious
2. ominously prophetic
Similar word(s): prophetic, prophetical, fateful, foreboding
3. puffed up with vanity
Similar word(s): pretentious, grandiloquent, overblown, pompous, pontifical