From Longman Dictionary of Contemporary Englishupper caseˌupper ˈcase noun [uncountable] technicalSLA letters written in capitals (A, B, C) rather than in small form (a, b, c)
Examples from the Corpus
upper case• BWright had created 19 letters, all upper case, to use in the project drawings.• Keywords are not included in square brackets and must be upper case.• Memory jogger Caps Lock will only type letters in upper case.• Should I scrap upper case and dash ahead with lower-case panache to show myself a proper mistress of the form?• In some systems the input script is restricted to upper case unconnected letters, or lower case unconnected characters.• Since variables named in lower case will never be confused with keywords, many programmers use upper case only for keywords. 