[ proo-fing ]
/ ˈpru fɪŋ /


the act or process of making a thing resistant, as in waterproof fabrics or fireproof material.
any chemical used in the manufacture of a substance to make it proof against water, fire, etc.

Origin of proofing

First recorded in 1900–05; proof + -ing1

Definition for proofing (2 of 2)


[ proof ]
/ pruf /



verb (used with object)

Origin of proof

1175–1225; Middle English prove, prooff, prof, proufe, alteration (by association with the vowel of prove) of preove, proeve, prieve, pref < Middle French preve, proeve, prueve < Late Latin proba a test, akin to Latin probāre to test and find good; cf. pree
Related formsre-proof, verb (used with object)un·proofed, adjective

Synonym study

1. See evidence. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for proofing

British Dictionary definitions for proofing


/ (pruːf) /




Word Origin for proof

C13: from Old French preuve a test, from Late Latin proba, from Latin probāre to test
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for proofing


[ prōōf ]

A demonstration of the truth of a mathematical or logical statement, based on axioms and theorems derived from those axioms.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.