/ Dictionary / Index A arc furnace: Meaning and Definition of Find definitions for: arc' fur"nace Pronunciation: [key] a furnace in which heat is generated by an electric arc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. arcform arch Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language