From Longman Dictionary of Contemporary Englishzip fileˈzip file (also zipped file) noun [countable] technical a computer file that has been made smaller so that it is easier to store and moveFrom Longman Business Dictionaryzip fileˈzip fileCOMPUTING a file that has been COMPRESSED (=made smaller) by changing the information in it into a special code, so that it uses less space when you store it. To read or use the file, you change it back into its original formI was sent the work in the form of a compressed zip file. → file