/bloh"ing/ , n.
1. the sound of any vapor or gas issuing from a vent under pressure.
2. Metall. a disturbance caused by gas or steam blowing through molten metal.
3. Also called blow molding . a method of producing hollowware by injecting air under pressure into a molten mass, as of glass or plastic, and shaping the material within a mold.
[ bef. 1000; ME, OE; see BLOW 2 , -ING 1 ]