To strike with sudden fear; give alarm to; arouse.
Sudden fear arousing to defense or escape.
A sound to apprize of danger or arouse from sleep; a mechanism, as of a clock, giving such signal.
The road agent started in alarm. – The Girl of the Golden West by David Belasco
He's nowhere, Reverend Brother, and shall I go and ring the fire- alarm?" – The Altar Steps by Compton MacKenzie
" Do not alarm yourself, Michel," answered Nicholl. – The Moon-Voyage by Jules Verne