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Meaning of pinfire

pin•fire

Pronunciation: (pin'fīr"), [key]
— adj.
  1. of or pertaining to a cartridge fitted with a pin that, when struck by the hammer of the firearm, causes the cartridge to explode.
  2. of or pertaining to a firearm that uses such a cartridge.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.