/ Dictionary / Index B blind casing,: Meaning and Definition of Find definitions for: blind' cas'ing Pronunciation: [key] (in a box window frame) a rough framework to which the trim is secured. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. blind alley blindcat Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language