Breadcrumb Home > 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 TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: agitprop Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language