alarm
nounUK /əˈlɑːm/
US /əˈlɑːrm/
A loud sound that wakes you up or warns you of danger.
My alarm rings at seven every morning.
OTHER MEANINGS
2. A feeling of fear or worry that something bad might happen.
She felt alarm when she heard the strange noise.
3. A device that makes a loud noise to warn people.
The fire alarm went off during lunch.
4. To make someone feel worried or afraid.
The news alarmed everyone in the town.