The Collaborative International Dictionary of English v.0.48:

Blower \Blow"er\, n.
   1. One who, or that which, blows.
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   2. (Mech.) A device for producing a current of air; as:
      (a) A metal plate temporarily placed before the upper part
          of a grate or open fire.
      (b) A machine for producing an artificial blast or current
          of air by pressure, as for increasing the draft of a
          furnace, ventilating a building or shaft, cleansing
          gram, etc.
          [1913 Webster]

   3. A blowing out or excessive discharge of gas from a hole or
      fissure in a mine.
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   4. The whale; -- so called by seamen, from the circumstance
      of its spouting up a column of water.
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   5. (Zool.) A small fish of the Atlantic coast (Tetrodon
      turgidus); the puffer.
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   6. A braggart, or loud talker. [Slang] --Bartlett.
      [1913 Webster]