portentous

Definitions

Of or like a portent; being a sign or warning that something momentous or calamitous is likely to happen.

Done in a pompously or overly solemn manner so as to impress.

Examples

The dark, swirling clouds over the horizon felt particularly portentous as the storm approached.

He delivered his speech with a portentous tone, hinting at the grave consequences of our inaction.

The sudden silence in the room was portentous, signaling that the negotiations had finally collapsed.

Synonyms

ominous foreboding sinister menacing significant pompous pretentious

Antonyms

unimportant insignificant trivial humble modest unpretentious auspicious