/ Dictionary / Index G grayback: Meaning and Definition of Find definitions for: gray•back Pronunciation: (grā'bak"), [key] — n. any of various marine and aquatic animals that are dark gray above and light-colored or white below, as the gray whale, the alewife, certain whitefish, and certain sandpipers. a Confederate soldier. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: grayback (Thesaurus) gray graybeard Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language