QUARTERDECK Meaning of QUARTERDECK in English quar ‧ ter ‧ deck /ˈkwɔːtədek $ ˈkwɔːrtər-/ BrE AmE noun [countable] the back part of the upper level of a ship, which is used mainly by officers Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012