/ Dictionary / Index S subfloor: Meaning and Definition of Find definitions for: sub•floor Pronunciation: (sub'flôr", -flōr"), [key] — n. a rough floor beneath a finished floor. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. subfix subfreezing Related Content Daily Word Quiz: sinister Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language