/ Dictionary / Index D drift mine: Meaning and Definition of Find definitions for: drift' mine" Pronunciation: [key] a mine the opening of which is dug into an outcrop of coal or ore. an underground placer mine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. driftless area drift net Related Content Daily Word Quiz: novice Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language