A sudden fear caused by the realization of danger.
A warning of existing or approaching danger.
An electrical, electronic, or mechanical device that serves to warn of danger by means of a sound or signal.
The sounding mechanism of an alarm clock.
A call to arms.
tr.v.
a·larmed, a·larm·ing, a·larms
To fill with alarm; frighten. See Synonyms at fear, frighten.
To give warning to.
[Middle English, from Old French alarme, from Old Italian allarme, from all'arme, to arms : alla, to the (from Latin ad illa : ad, to; see ad- + illa, neuter pl. of ille, that, the; see al-1 in Indo-European roots) + arme, arms (from Latin arma; see ar- in Indo-European roots).] a·larm'ing·ly adv.