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Meaning of proofing

proof•ing

Pronunciation: (pr'fing), [key]
— n.
  1. the act or process of making a thing resistant, as in waterproof fabrics or fireproof material.
  2. any chemical used in the manufacture of a substance to make it proof against water, fire, etc.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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