The layout of a publication or document.
(hence) The form of presentation of something.
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.
A file type.
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.