Breadcrumb Home > Dictionary > Index G gnash: Meaning and Definition of Find definitions for: gnash Pronunciation: (nash), [key] — v.t. to grind or strike (the teeth) together, esp. in rage or pain. to bite with grinding teeth. —v.i. to gnash the teeth. —n. an act of gnashing. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: gnash (Thesaurus) gnarly gnat TrendingHere are the facts and trivia that people are buzzing about. Did Birds Evolve from Dinosaurs? The Twelve Dancing Princesses Current Events This Week: January 2023 African Americans by the Numbers Andersen's Fairy Tales: Contents The Celtic Twilight: A Teller of Tales ✖ Related Content Daily Word Quiz: hubris Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language