2 uses
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Definition
very important; or indicating something important in the future
or:
acting overly important or serious
or:
acting overly important or serious
- A portentous sigh.Chapter 6 (20% in)
- Kennicott was yawning, more portentously.Chapter 14 (19% in)
There are no more uses of "portentous" in Main Street.
Typical Usage
(best examples)