format UK /ˈfɔː(ɹ).mæt/US /ˈfɔːɹ.mæt/noun 4verb 3forms 3 noun4 •The layout of a publication or document.The older manuscripts had been written in a much larger format than that found convenient for university work. — 1896 •The form of presentation of something. •A file type. •The type of programming that a radio station broadcasts; such as a certain genre of music, news, sports, talk, etc.The radio station changed the format of its evening program. verb3 •To create or edit the layout of a document. •Change a document so it will fit onto a different type of page. •To prepare a mass storage medium for initial use, erasing any existing data in the process.I lost weeks of work when I inadvertently formatted my hard drive. formsformatted · formatting · formats