/ Dictionary / Index Q Q.F.: Meaning and Definition of Find definitions for: Q.F. Pronunciation: [key] quick-firing. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Q.E.F. Q-factor Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language