[ C or U ] specialized Each and every of the two kinds, cash or smaller, in which a letter on the alphabet may be penned or printed: case - the enclosing frame close to a doorway or window opening; "the casings experienced rotted away and needed to get replaced" https://lorenzozjuww.wssblogs.com/35557832/how-hbs-case-study-analysis-can-save-you-time-stress-and-money