kilobyte Syllabification: (kil·o·byte)Pronunciation: /ˈkiləˌbīt/ (abbreviation: Kb or KB)Translate kilobyte | into French | into German | into Italian | into Spanish Definition of kilobyte noun Computing a unit of memory or data equal to 1,024 (210) bytes. kilobyte in other Oxford dictionaries Definition of kilobyte in the British & World English dictionary