/ Dictionary / Index Q Q-factor: Meaning and Definition of Find definitions for: Q-fac•tor Pronunciation: (ky'fak"tur), [key] — n. Q (def. 6). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Q.F. Q fever Related Content Daily Word Quiz: apogee Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language