A device that emits a sound or signal to alert people to a specific danger or situation. noun
The smoke alarm went off in the middle of the night, waking everyone up.
He set the alarm on his phone to wake him up at 6 AM.
A feeling of fear or anxiety caused by the sudden realization of danger. noun
She felt a sense of alarm when she heard footsteps behind her in the dark alley.
The news of the approaching storm caused alarm among the residents.
To make someone aware of a danger or problem, especially with the intention of causing them to take action. verb
The sudden drop in temperature alarmed the farmers about the possibility of frost.
He alarmed the authorities by reporting suspicious activity in the area.