/ Dictionary / Index S sheatfish: Meaning and Definition of Find definitions for: sheat•fish Pronunciation: (shēt'fish"), [key] — pl. -fish•es, -fish. a large, freshwater catfish, Silurus glanis, inhabiting rivers in central and eastern Europe, sometimes reaching a weight of 400 lb. (181.4 kg). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sheatfish (Thesaurus) shear zone sheath 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