/ Dictionary / Index G grilse: Meaning and Definition of Find definitions for: grilse Pronunciation: (grils), [key] — pl. grils•es, grilse. a young Atlantic salmon as it returns from the sea to fresh water for the first time. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. grillwork grim Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language