Longman Dictionary English From Longman Dictionary of Contemporary EnglishRelated topics: Newspapers, printing, publishingslipcaseslip‧case /ˈslɪpkeɪs/ noun [countable] TCNa hard cover, like a box, for putting a book inExamples from the Corpusslipcase• The books have stylish, yet subtle, blue hardbound covers, although the slipcase will. ldoceonline.com