'Firelock' definitions:

Definition of 'firelock'

From: WordNet
noun
A muzzle loader that had a flintlock type of gunlock [syn: flintlock, firelock]

Definition of 'Firelock'

From: GCIDE
  • Firelock \Fire"lock`\, n. An old form of gunlock, as the flintlock, which ignites the priming by a spark; perhaps originally, a matchlock. Hence, a gun having such a lock. [1913 Webster]