A program that compares files in order to determine how or whether they differ.‘the drawback to this is that the diff does not indicate metadata changes’as modifier ‘given two files, the diff program generates a listing that highlights the differences between them’
2A set of gears allowing a motor vehicle's driven wheels to revolve at different speeds when going around corners; a differential gear.
3informal A difference.
- ‘what is the diff between monkeys and apes?’
Compare (files) in order to determine how or whether they differ.‘you should be able to diff the two files, thereby speeding up this step considerably’