/ Dictionary / Index S stamp tax: Meaning and Definition of Find definitions for: stamp' tax" Pronunciation: [key] a tax whose revenue is derived from the sale of stamps that are required to be affixed to certain retail merchandise and legal documents. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. stamp mill Stan 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