Meaning of the word portentous in English

What does portentous mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

portentous

US /pɔːrˈten.t̬əs/
UK /pɔːrˈten.t̬əs/

Adjective

1.

too serious and trying to be very important:

Example:
The problem with the book is that it sometimes descends into portentous philosophizing.
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