/ Dictionary / Index H Hall process: Meaning and Definition of Find definitions for: Hall' proc"ess Pronunciation: [key] a process in which aluminum is refined by electrolytic reduction of alumina fused with cryolite. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. halloysite halls of ivy Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language