- 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.
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Origin of proof
synonym study for proof
historical usage of proof
OTHER WORDS FROM proofre-proof, verb (used with object)un·proofed, adjective
Definition for proof (2 of 2)
Example sentences from the Web for proof
Palmer's desire to be loved is large, his need for proofs of appreciation considerable.
A 20-year-old cook was detained for threatening national security, but no proofs whatsoever were presented in court.Venezuela’s Security Forces: A Killer Elite Beyond the Law|Marcel Ventura|April 22, 2014|DAILY BEAST
October 1: “Big moments in geometry class this week...we have completed our first proofs!”Colleen Ritzer Is the Second U.S. Math Teacher Slain in Two Days|Michael Daly|October 24, 2013|DAILY BEAST
She said she "never doubted" her sister would come home as "we had all the proofs."Blonde Child Reunited With Roma Family After Irish Police Blunder|Tom Sykes|October 23, 2013|DAILY BEAST
Yeah, sometimes I go to this little Italian place around the corner called Otto to read or to do proofs.
Still, Louis did not reply; but proofs of his contending soul convulsed the features his agitated hand tried to conceal.The Pastor's Fire-side Vol. 3 of 4|Jane Porter
These extracts from an agreement drawn up by the leading men in Peru in 1812 are proofs of remarkable energy.Life of Richard Trevithick, Volume II (of 2)|Francis Trevithick
The hardened devils of Anzacs, who had taken cover betwixt the shell-proofs built of piles of stores, roared with laughter.Gallipoli Diary, Volume I|Ian Hamilton
This truth is as old as Homer, and its proofs are as capable of demonstration as a mathematical axiom.
The proofs you have given so far are but solemn pledges to outdo all your contemporaries.The Life & Letters of Peter Ilich Tchaikovsky|Modeste Tchaikovsky
British Dictionary definitions for proof (1 of 2)
- 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