/ Dictionary / Index K key case: Meaning and Definition of Find definitions for: key' case" Pronunciation: [key] a small case in which keys are carried. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. key card key club Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language