/ Dictionary / Index G greenbug: Meaning and Definition of Find definitions for: green•bug Pronunciation: (grēn'bug"), [key] — n. a pale-green aphid, Schizaphis graminum, of North America, destructive of wheat, other small grains, and alfalfa. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. greenbrier green card Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language