[1] : The Collaborative International Dictionary of English v.0.48

alarm \alarm"\ .alaumrm", n. f. alarme, it. all' arme
   to arms  fr. l. arma, pl., arms. see arms, and cf.
   alarum.
   1. a summons to arms, as on the approach of an enemy.
      1913 webster

            arming to answer in a night alarm.    --shak.
      1913 webster

   2. any sound or information intended to give notice of
      approaching danger; a warning sound to arouse attention; a
      warning of danger.
      1913 webster

            sound an alarm in my holy mountain.   --joel ii. 1.
      1913 webster

   3. a sudden attack; disturbance; broil. r. "these home
      alarms." --shak.
      1913 webster

            thy palace fill with insults and alarms. --pope.
      1913 webster

   4. sudden surprise with fear or terror excited by
      apprehension of danger; in the military use, commonly,
      sudden apprehension of being attacked by surprise.
      1913 webster

            alarm and resentment spread throughout the camp.
                                                  --macaulay.
      1913 webster

   5. a mechanical contrivance for awaking persons from sleep,
      or rousing their attention; an alarum.
      1913 webster

   alarm bell, a bell that gives notice on danger.

   alarm clock or watch, a clock or watch which can be so
      set as to ring or strike loudly at a prearranged hour, to
      wake from sleep, or excite attention.

   alarm gauge, a contrivance attached to a steam boiler for
      showing when the pressure of steam is too high, or the
      water in the boiler too low.

   alarm post, a place to which troops are to repair in case
      of an alarm.
      1913 webster

   syn: fright; affright; terror; trepidation; apprehension;
        consternation; dismay; agitation; disquiet; disquietude.

   usage: alarm, fright, terror, consternation. these
          words express different degrees of fear at the
          approach of danger. fright is fear suddenly excited,
          producing confusion of the senses, and hence it is
          unreflecting. alarm is the hurried agitation of
          feeling which springs from a sense of immediate and
          extreme exposure. terror is agitating and excessive
          fear, which usually benumbs the faculties.
          consternation is overwhelming fear, and carries a
          notion of powerlessness and amazement. alarm agitates
          the feelings; terror disorders the understanding and
          affects the will; fright seizes on and confuses the
          sense; consternation takes possession of the soul, and
          subdues its faculties. see apprehension.
          1913 webster
see also:
arms alarum alarm bell alarm clock watch alarm gauge 
alarm post alarm fright terror consternation 
apprehension 

Alarm >> A Words
Alarm, definition of term: Alarm
alarm_pag1.html

Gauge >> G Words
Gauge, definition of term: Gauge
gauge_pag1.html

Alarm System >> A Words
Alarm System, definition of term: Alarm System
alarm+system_pag1.html

Gauge Boson >> G Words
Gauge Boson, definition of term: Gauge Boson
gauge+boson_pag1.html

Weather Gauge >> W Words
Weather Gauge, definition of term: Weather Gauge
weather+gauge_pag1.html

Rain Gauge >> R Words
Rain Gauge, definition of term: Rain Gauge
rain+gauge_pag1.html