/ Dictionary / Index B backfit: Meaning and Definition of Find definitions for: back•fit Pronunciation: (bak'fit"), [key] — -fit -fit•ted, -fit•ting. to update by providing new or improved equipment or features: a five-year program of installing new power plants and backfitting existing ones. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. backfist backflap hinge Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language