/ Dictionary / Index S sheath knife: Meaning and Definition of Find definitions for: sheath' knife" Pronunciation: [key] a knife carried in a sheath. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sheathing sheath pile Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language