alarm
//əˈlɑːrm//
Noun
alarmsPlural
1
A device that makes a loud sound to warn people of danger or to wake them up.
The fire alarm went off in the middle of the night.
2
A sudden feeling of fear or anxiety caused by the awareness of danger.
She felt a sense of alarm when she heard the strange noise.
3
A warning of danger.
The alarm was raised when smoke was detected in the building.
Verb
1
To cause someone to feel frightened, anxious, or disturbed.
The sudden noise alarmed the children.
2
To warn someone of danger.
The guard alarmed the workers about the fire.