/ Dictionary / Index G greensand: Meaning and Definition of Find definitions for: green•sand Pronunciation: (grēn'sand"), [key] — n. a sandstone containing much glauconite, which gives it a greenish hue. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: greensand (Thesaurus) greenroom greensand process Related Content Daily Word Quiz: dispel Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language