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preprocessor

US:USA pronunciation: respelling(prē′pros′es ər, -ə sər or, esp. Brit., -prō′ses ər, -sə sər)

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WordReference Random House Unabridged Dictionary of American English © 2026

pre•proc•es•sor n. [Computers.]

Computinga program that performs some type of processing, as organization of data or preliminary computation, in advance of another program that will perform most of the processing.

pre- + processor 1965–70

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