/ Dictionary / Index D duplex process: Meaning and Definition of Find definitions for: du'plex proc"ess Pronunciation: [key] any of several methods for making steel in which the process is begun in one furnace and finished in another. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. duplex lock duplex pump Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language