Meaning of center-fire

cen•ter-fire

Pronunciation: (sen'tur fīr"), [key]
— adj.
  1. (of a cartridge) having the primer in the center of the base. Cf. rimfire (def. 1).
  2. (of firearms) designed for the use of such cartridges.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.