a violent gust of wind.-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.-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.-the sound made by blowing a wind instrument; strictly, the sound produces at one breath.-a sudden, pernicious effect, as if by a noxious wind, especially on animals and plants; a blight.-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.-a flatulent disease of sheep.-to injure, as by a noxious wind; to cause to wither; to stop or check the growth of, and prevent from fruit-bearing, by some pernicious influence; to blight; to shrivel.-hence, to affect with some sudden violence, plague, calamity, or blighting influence, which destroys or causes to fail; to visit with a curse; to curse; to ruin; as, to blast pride, hopes, or character.-to confound by a loud blast or din.-to rend open by any explosive agent, as gunpowder, dynamite, etc.; to shatter; as, to blast rocks.-to be blighted or withered; as, the bud blasted in the blossom.-to blow; to blow on a trumpet.