/ Dictionary / Index D depletion allowance: Meaning and Definition of Find definitions for: deple'tion allow"ance Pronunciation: [key] a tax reduction allowed on income from exhaustible resources, as oil or timber. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. deplete deplorable Related Content Daily Word Quiz: serendipity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language