n. An instrument by which a current of air or gas is driven through the flame of a lamp, candle, or gas-jet, to direct the flame upon a substance, in order to fuse it, an intense heat being created by the rapid supply of oxygen and the concentration of the flame upon a small area.n. Same as blow-gun.Relating in any way to a blowpipe, or to blowpiping: as, blowpipe analysis.To use the blowpipe; conduct chemical experiments or perform mechanical operations by means of the blowpipe.n. A blast-pipe or blower-pipe; hence the steam-pipe for a steam-blast.