Merriam-Webster Collegiate Dictionary - storm

 I. noun  Usage: often attributive  Etymology: Middle English, from Old English; akin to Old High German sturm ~, Old English styrian to stir  Date: before 12th century  1.  a. a disturbance of the atmosphere marked by wind and usually by rain, snow, hail, sleet, or thunder and lightning  b. a heavy fall of rain, snow, or hail  c.  (1) wind having a speed of 64 to 72 miles (103 to 117 kilometers) per hour  (2) whole gale — see Beaufort scale table  d. a serious disturbance of any element of nature  2. a disturbed or agitated state ~s of emotion ; a sudden or violent commotion  3. a heavy discharge of objects (as missiles)  4. a tumultuous outburst a ~ of protests  5.  a. paroxysm 2  b. a sudden heavy influx or onset  6. a violent assault on a defended position  7. plural ~ window  II. verb  Date: 15th century  intransitive verb  1.  a. to blow with violence  b. to rain, hail, snow, or sleet vigorously  2. to attack by ~ ~ed ashore at zero hour  3. to be in or to exhibit a violent passion ; rage ~ing at the unusual delay  4. to rush about or move impetuously, violently, or angrily the mob ~ed through the streets  transitive verb to attack, take, or win over by ~ ~ a fort  Synonyms: see attack