Douglas Harper's Etymology Dictionary
also pre-process, 1956, from pre- + process (v.). Related: Preprocessed; preprocessing.\n\nPreprocessed foods are not only here but are gaining such a tremendous acceptance that soon there will be little else on the market. This eliminates the need for mixing, peeling, blending and other devices used in the preparation of raw foods. "Popular Mechanics" October 1956]\n
Wiktionary
vb. (context computing English) To process in advance.
Usage examples of "preprocess".
On her eighteenth day at Lerner Hold, Maia and most of the other workers were assigned to haul barrowloads of preprocessed iron ore from a mine two miles away, staffed entirely by a clan of albino women whose natural pallor had become tinted by rusty oxides, permeating their skin.
DEC computers were used for everything from preprocessing the datastreams that poured incessantly through the laser link between Jupiter and Earth to controlling the instruments contained in the robot landed on Jo.
Since they've gone to the trouble of concentrating the more appetizing inorganic compounds into a preprocessed form, it is only a question of time until some of them learn a new diet.
Put in all the packets of preprocessed food you can find, then the tent I used when we first arrived, and anything else you think will be useful to camp out in the jungle—the little fission blade, my portable heater, that kind of stuff.
It is highly purposive, preprocessed to eliminate unnecessary repetition, consciously designed to maximize informational content.