omen

noun
UK /ˈəʊmən/
US /ˈoʊmən/

A sign that tells you something good or bad will happen.

The dark clouds were an omen of the coming storm.


OTHER MEANINGS

2. A warning of a future event, often something unpleasant.

The sudden silence in the room was an omen of bad news.

3. A good or lucky sign.

Seeing a rainbow on your wedding day is considered a good omen.

4. Something that predicts the outcome of a future happening.

The first test results were an omen of how the season would go.