/ Dictionary / Index C casing knife: Meaning and Definition of Find definitions for: cas'ing knife" Pronunciation: [key] a knife for trimming wallpaper after it has been attached. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. casinghead gas casing nail 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