Storm n.
  1. A violent disturbance of the atmosphere, attended by wind, rain, snow, hail, or thunder and lightning; hence, often, a heavy fall of rain, snow, or hail, whether accompanied with wind or not.
  We hear this fearful tempest sing,
  Yet seek no shelter to avoid the storm.   --Shak.
  2. A violent agitation of human society; a civil, political, or domestic commotion; sedition, insurrection, or war; violent outbreak; clamor; tumult.
     I will stir up in England some black storm.   --Shak.
  Her sister
  Began to scold and raise up such a storm.   --Shak.
  3. A heavy shower or fall, any adverse outburst of tumultuous force; violence.
     A brave man struggling in the storms of fate.   --Pope.
  4. Mil. A violent assault on a fortified place; a furious attempt of troops to enter and take a fortified place by scaling the walls, forcing the gates, or the like.
  Note: ☞ Storm is often used in the formation of self-explained compounds; as, storm-presaging, stormproof, storm-tossed, and the like.
  Anticyclonic storm Meteor., a storm characterized by a central area of high atmospheric pressure, and having a system of winds blowing spirally outward in a direction contrary to that cyclonic storms. It is attended by low temperature, dry air, infrequent precipitation, and often by clear sky. Called also high-area storm, anticyclone. When attended by high winds, snow, and freezing temperatures such storms have various local names, as blizzard, wet norther, purga, buran, etc.
  Cyclonic storm. Meteor. A cyclone, or low-area storm. See Cyclone, above.
  Magnetic storm. See under Magnetic.
  Storm-and-stress period 
  Storm center Meteorol., the center of the area covered by a storm, especially by a storm of large extent.
  Storm door Arch., an extra outside door to prevent the entrance of wind, cold, rain, etc.; -- usually removed in summer.
  Storm path Meteorol., the course over which a storm, or storm center, travels.
  Storm petrel. Zool. See Stormy petrel, under Petrel.
  Storm sail Naut., any one of a number of strong, heavy sails that are bent and set in stormy weather.
  Storm scud. See the Note under Cloud.
  Syn: -- Tempest; violence; agitation; calamity.
  Usage: Storm, Tempest. Storm is violent agitation, a commotion of the elements by wind, etc., but not necessarily implying the fall of anything from the clouds. Hence, to call a mere fall or rain without wind a storm is a departure from the true sense of the word. A tempest is a sudden and violent storm, such as those common on the coast of Italy, where the term originated, and is usually attended by a heavy rain, with lightning and thunder.
  Storms beat, and rolls the main;
  O! beat those storms, and roll the seas, in vain.   --Pope.
  What at first was called a gust, the same
  Hath now a storm's, anon a tempest's name.   --Donne.
  storm center
       n 1: a center of trouble or disturbance [syn: storm centre]
       2: the central area or point of lowest barometric pressure
          within a storm
       3: the central area or place of lowest barometric pressure
          within a storm [syn: storm centre]