The Collaborative International Dictionary of English v.0.48:
Blast \Blast\ (bl[.a]st), n. [AS. bl[=ae]st a puff of wind, a
blowing; akin to Icel. bl[=a]str, OHG. bl[=a]st, and fr. a
verb akin to Icel. bl[=a]sa to blow, OHG. bl[^a]san, Goth.
bl[=e]san (in comp.); all prob. from the same root as E.
blow. See Blow to eject air.]
1. A violent gust of wind.
And see where surly Winter passes off,
Far to the north, and calls his ruffian blasts;
His blasts obey, and quit the howling hill.
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.
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.
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
4. The sound made by blowing a wind instrument; strictly, the
sound produces at one breath.
One blast upon his bugle horn
Were worth a thousand men. --Sir W.
The blast of triumph o'er thy grave. --Bryant.
5. A sudden, pernicious effect, as if by a noxious wind,
especially on animals and plants; a blight.
By the blast of God they perish. --Job iv. 9.
Virtue preserved from fell destruction's blast.
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.
7. A flatulent disease of sheep.
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.]