/ Dictionary / Index F firelock: Meaning and Definition of Find definitions for: fire•lock Pronunciation: (fīr'lok"), [key] — n. a gun having a lock in which the priming is ignited by sparks struck from flint and steel, as the flintlock musket. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: firelock (Thesaurus) fire line fireman Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language