proof (pruːf)

n

1. any evidence that establishes or helps to establish the truth, validity, quality, etc, of something

2. (Law) law the whole body of evidence upon which the verdict of a court is based

3. (Mathematics) maths logic a sequence of steps or statements that establishes the truth of a proposition. See also direct17, induction4, induction8

4. the act of testing the truth of something (esp in the phrase put to the proof)

5. (Law) Scots law trial before a judge without a jury

6. (Printing, Lithography & Bookbinding) printing a trial impression made from composed type, or a print-out (from a laser printer, etc) for the correction of errors

7. (Art Terms) (in engraving, etc) a print made by an artist or under his supervision for his own satisfaction before he hands the plate over to a professional printer

8. (Photography) photog a trial print from a negative

9. (Brewing)

a. the alcoholic strength of proof spirit

b. the strength of a beverage or other alcoholic liquor as measured on a scale in which the strength of proof spirit is 100 degrees

adj

10. (foll by: against) able to resist; impervious (to): the roof is proof against rain.

11. (Brewing) having the alcoholic strength of proof spirit

12. (Arms & Armour (excluding Firearms)) of proved strength or impenetrability: proof armour.

vb

13. (Printing, Lithography & Bookbinding) (tr) to take a proof from (type matter, a plate, etc)

14. (Journalism & Publishing) to proofread (text) or inspect (a print, etc), as for approval

15. to render (something) proof, esp to waterproof

What if nuts needs a drop? :P you need proof either way.