WATCHKEEPER Meaning of WATCHKEEPER in English watch ‧ keep ‧ er /ˈwɒtʃˌkiːpə $ ˈwɑːtʃˌkiːpər, ˈwɒːtʃ-/ BrE AmE noun [countable] someone whose job is to guard or protect something, especially a ship Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012