/ Dictionary / Index S stamp mill: Meaning and Definition of Find definitions for: stamp' mill" Pronunciation: [key] — Mining. Mining. a mill or machine in which ore is crushed to powder by means of heavy stamps or pestles. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. stamping ground stamp tax Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language