/ Dictionary / Index G greenie: Meaning and Definition of Find definitions for: green•ie Pronunciation: (grē'nē), [key] — n. an amphetamine pill, esp. one that is green in color. a conservationist or environmentalist, esp. one who participates in protest demonstrations. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. greenhouse whitefly greening Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language