Definition of diff in English:

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diff

Pronunciation: /dif/

noun

informal
short for difference.

verb

[with object]
Computing Compare (files) in order to determine how or whether they differ.
Example sentences
  • If you took my advice earlier and keep RPM metadata as a normal part of your backup process, you should be able to diff the two files, thereby speeding up this step considerably.
  • It uses an ICA-like streaming protocol, but without the diffing or clever region updates that the other uses.

For editors and proofreaders

Syllabification: diff

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