Oxford Dictionary English backslash noun noun BrE BrE//ˈbækslæʃ// ; NAmE NAmE//ˈbækslæʃ// Using a computer, Punctuation Add to my wordlistjump to other results a mark ( \ ), used in computer commands compare forward slash See related entries: Using a computer, PunctuationSee backslash in the Oxford Advanced American DictionaryCheck pronunciation: backslash oxfordlearnersdictionaries.com