1) Bobbin 2) Fishing reel 3) Reel-like device 4) Weaving equipment 
A pirn is a rod onto which weft thread is wound for use in weaving. Unlike a bobbin, it is fixed in place, and the thread is delivered off the end of the pirn rather than from the center. A typical pirn is made of wood or plastic and is slightly tapered for most of its length, flaring out more sharply at the base, which fits over a pin in the shut...
• (n.) A quill or reed on which thread or yarn is wound; a bobbin; also, the wound yarn on a weaver`s shuttle; also, the reel of a fishing rod.
Type of yarn package designed for the shuttles of automatic looms.
Pirn noun [ Etymol. uncertain.] A quill or reed on which thread or yarn is wound; a bobbin; also, the wound yarn on a weaver's shuttle; also, the reel of a fishing rod. [ Scot.]
A type of cop holding the yarn.