Source : Webster's Revised Unabridged Dictionary (1913)

Overblow \O`ver*blow"\, v. i.
   1. To blow over, or be subdued. [R.] --Spenser.

   2. (Mus.) To force so much wind into a pipe that it produces
      an overtone, or a note higher than the natural note; thus,
      the upper octaves of a flute are produced by overblowing.

Overblow \O`ver*blow"\, v. t.
   To blow away; to dissipate by wind, or as by wind.

         When this cloud of sorrow's overblown.   --Waller.