1. to change the format or structure of something, especially a computer file or document
Usage: computing
2. to prepare a computer disk for use by erasing all existing data and setting up a new file system
Usage: computing

Examples

• I need to reformat this document to match the company’s style guide.
• The hard drive crashed, so we had to reformat it completely.
• She reformatted the spreadsheet to make it easier to read.
• Before selling the computer, make sure to reformat the hard disk.
• The publisher asked the author to reformat the manuscript.
• You can reformat the USB drive to work with different operating systems.