1. suggesting that something bad or unpleasant will happen; threatening

Examples

• Dark clouds gathered in an ominous sky before the storm.
• The silence in the room felt ominous after the heated argument.
• There was an ominous crack in the foundation of the old building.
• The doctor’s ominous tone worried the patient’s family.
• An ominous rumbling sound came from the volcano.
• The stock market’s decline was an ominous sign for the economy.