SOURDOUGH Meaning of SOURDOUGH in English sour ‧ dough /ˈsaʊədəʊ $ ˈsaʊrdoʊ/ BrE AmE noun [uncountable] uncooked ↑ dough (=bread mixture) that is left to ↑ ferment before being used to make bread Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012