[1] : The Collaborative International Dictionary of English v.0.48

blast \blast\ bl.ast, n. as. bl=aest a puff of wind, a
   blowing; akin to icel. bl=astr, ohg. bl=ast, and fr. a
   verb akin to icel. bl=asa to blow, ohg. bl^asan, goth.
   bl=esan in comp.; all prob. from the same root as e.
   blow. see blow to eject air.
   1. a violent gust of wind.
      1913 webster

            and see where surly winter passes off,
            far to the north, and calls his ruffian blasts;
            his blasts obey, and quit the howling hill.
                                                  --thomson.
      1913 webster

   2. a forcible stream of air from an orifice, as from a
      bellows, the mouth, etc. hence: the continuous blowing to
      which one charge of ore or metal is subjected in a
      furnace; as, to melt so many tons of iron at a blast.
      1913 webster

   note: the terms hot blast and cold blast are employed to
         designate whether the current is heated or not heated
         before entering the furnace. a blast furnace is said to
         be in blast while it is in operation, and out of blast
         when not in use.
         1913 webster

   3. the exhaust steam from and engine, driving a column of air
      out of a boiler chimney, and thus creating an intense
      draught through the fire; also, any draught produced by
      the blast.
      1913 webster

   4. the sound made by blowing a wind instrument; strictly, the
      sound produces at one breath.
      1913 webster

            one blast upon his bugle horn
            were worth a thousand men.            --sir w.
                                                  scott.
      1913 webster

            the blast of triumph o'er thy grave.  --bryant.
      1913 webster

   5. a sudden, pernicious effect, as if by a noxious wind,
      especially on animals and plants; a blight.
      1913 webster

            by the blast of god they perish.      --job iv. 9.
      1913 webster

            virtue preserved from fell destruction's blast.
                                                  --shak.
      1913 webster

   6. the act of rending, or attempting to rend, heavy masses of
      rock, earth, etc., by the explosion of gunpowder,
      dynamite, etc.; also, the charge used for this purpose.
      "large blasts are often used." --tomlinson.
      1913 webster

   7. a flatulent disease of sheep.
      1913 webster

   blast furnace, a furnace, usually a shaft furnace for
      smelting ores, into which air is forced by pressure.

   blast hole, a hole in the bottom of a pump stock through
      which water enters.

   blast nozzle, a fixed or variable orifice in the delivery
      end of a blast pipe; -- called also blast orifice.

   in full blast, in complete operation; in a state of great
      activity. see blast, n., 2. colloq.
      1913 webster
see also:
blow blast furnace blast hole blast nozzle blast orifice in full blast 
blast 

[2] : WordNet (r) 2.0

blast furnace
     n : a furnace for smelting of iron from iron oxide ores;
         combustion is intensified by a blast of air

Blast Furnace >> B Words
Blast Furnace, definition of term: Blast Furnace
blast+furnace_pag1.html

Furnace >> F Words
Furnace, definition of term: Furnace
furnace_pag1.html

Blast >> B Words
Blast, definition of term: Blast
blast_pag1.html