Definition for proofing (2 of 2)
- the arbitrary standard strength, as of an alcoholic liquor.
- strength with reference to this standard: “100 proof” signifies a proof spirit, usually 50% alcohol.
- a trial impression, as of composed type, taken to correct errors and make alterations.
- one of a number of early and superior impressions taken before the printing of the ordinary issue: to pull a proof.
verb (used with object)
- to test the effectiveness of (yeast), as by combining with warm water so that a bubbling action occurs.
- to cause (especially bread dough) to rise due to the addition of baker's yeast or other leavening.
Origin of proof
Related formsre-proof, verb (used with object)un·proofed, adjective
Examples from the Web for proofing
When drawings are to be washed out for proofing or printing, the plate should first be thinly gummed up.Practical Lithography|Alfred Seymour
Raw rubber has been used to some extent for proofing purposes, as for the manufacture of material for hoods of motor-cars.The Preparation of Plantation Rubber|Sidney Morgan
Kerned types are a source of trouble because of the ease with which these projections break off during composition, proofing, etc.Type|A. A. Stewart
The proofing machines won't operate here either, of course, and so we need human personnel.Helpfully Yours|Evelyn E. Smith
There are, or ought to be, three aims in the process of proofing and stiffening, all the three being of equal importance.The Chemistry of Hat Manufacturing|Watson Smith
British Dictionary definitions for proofing
- the alcoholic strength of proof spirit
- the strength of a beverage or other alcoholic liquor as measured on a scale in which the strength of proof spirit is 100 degrees