DIFF

Noun

diff (plural diffs)

(slang) Abbreviation of difference.

(computing) Any program which compares two files or sets of files and outputs a description of the differences between them.

(computing) The output of a diff program. A diff file.

(medicine) Abbreviation of differential: differential of types of white blood cell in a complete blood count.

(rock climbing) A difficult route.

Verb

diff (third-person singular simple present diffs, present participle diffing, simple past and past participle diffed)

(transitive, computing) To run a diff program on (files or items) so as to produce a description of the differences between them, as for a patch file.

(transitive, computing) To compare two files or other objects, manually or otherwise.

Proper noun

diff

(computing) A program, historically part of the Unix operating system, which compares two files or sets of files and outputs a description of the differences between them.

Source: Wiktionary