/ Dictionary / Index S shellfish: Meaning and Definition of Find definitions for: shell•fish Pronunciation: (shel'fish"), [key] — pl. -fish, -fish•es. an aquatic animal having a shell, as the oyster and other mollusks and the lobster and other crustaceans. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: shellfish (Thesaurus) shellfire shellflower Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language