MEANING: (adj.) showing or being a sign of menace or evil
There was an ominous thunder in the clouds signaling the coming of the storm.
There was something ominous and sinister about her presence that made everyone scared.
An ominous silence fell across the room as I asked the whereabouts of the kid.
SYNONYMS: Dire, Foreboding, Sinister
ANTONYMS: Unthreatening, Auspicious, Promising