Source : Webster's Revised Unabridged Dictionary (1913)

Meteorology \Me`te*or*ol"o*gy\, n. [Gr. ?; ? + ? discourse: cf.
   F. m['e]t['e]orologie. See {Meteor}.]
   The science which treats of the atmosphere and its phenomena,
   particularly of its variations of heat and moisture, of its
   winds, storms, etc.

Source : WordNet®

meteorology
     n 1: predicting what the weather will be [syn: {weather
          forecasting}]
     2: the earth science dealing with phenomena of the atmosphere
        (especially weather)