/ Dictionary / Index U upper case: Meaning and Definition of Find definitions for: up'per case' Pronunciation: [key] — Print. Print. See under (def. 8). up•per•case Pronunciation: (up'ur-kās'), [key] — adj., v., n. -cased, -cas•ing, —adj. (of an alphabetical character) capital. pertaining to or belonging in the upper case. —v.t. to print or write with an uppercase letter. —n. a capital letter. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: uppercase (Thesaurus) Upper Carboniferous upper chamber Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language