/ Dictionary / Index T tar sand: Meaning and Definition of Find definitions for: tar' sand" Pronunciation: [key] — Geol. Geol. bituminous sand or sandstone from which asphalt can be obtained. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tarsal Tarshish Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language