diff

¹ American  

[dif] / dɪf /

noun

1. Informal. difference.

   What’s the diff if I go Tuesday or Wednesday?

2. Computers. an operation that computes and displays the data difference or differences between two files, usually between two versions of the same file: Go back to the original program files you downloaded and run a diff to see what has changed.

   Before you submit your work, always do a diff on it.

   Go back to the original program files you downloaded and run a diff to see what has changed.

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verb (used with object)

1. Computers. to compare (data files) and display the difference or differences.

   It’s easier to diff the files if they are in the same repository.

diff. ² American  

abbreviation

1. difference.

2. different.

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Etymology

Origin of diff

First recorded in 1600–25; by shortening