From Longman Dictionary of Contemporary Englishbackslashback‧slash /ˈbækslæʃ/ ●○○ noun [countable] TCNa line (\) used in writing to separate words, numbers, or lettersFrom Longman Business Dictionarybackslashback‧slash /ˈbækslæʃ/ noun [countable]COMPUTING a line (\) used in writing to separate words, numbers, or letters