/ Dictionary / Index P potash alum: Meaning and Definition of Find definitions for: pot'ash al'um Pronunciation: [key] — Chem. Chem. alum (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. potash potash feldspar Related Content Daily Word Quiz: eccentric Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language