evidence or argument establishing a fact or the truth of a statement

you will be asked to give proof of your identity

this is not a proof for the existence of God

a trial impression of a page, taken from type or film and used for making corrections before final printing

the strength of distilled alcoholic spirits, relative to proof spirit taken as a standard of 100

powerful 132-proof rum

a test or trial of something

a trial or a civil case before a judge without a jury

make (fabric) waterproof

if you are using a piece of lightweight canvas it will be necessary to proof the fabric when complete

make a proof of (a printed work, engraving, etc.)

proof each plate and print it on acetate first

activate (yeast) by the addition of liquid

proof the yeast with the teaspoon of sugar