The phrase "ominous note" refers to something that is a warning or indication of something bad or threatening that might happen in the future. It suggests a feeling of danger or unease.
Sentences with «ominous note»
The Cloverfield Paradox may have answered questions about how the attack on New York started, but it ends on a very ominous note for humanity. (cbr.com)
The final chapter on the future had ominous notes about the potential for attacks by figures such as Osama bin Laden. (goodreads.com)
Further searching also revealed a follow - up post from his worried parents in 2012, asking if any of his friends had heard from him and why his last letter was a blood - stained, ominous note simply reading «the big man licks his teeth when he watches me». (pointandclickbait.com)