from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Having a smaller proportion of alcohol than proof spirit.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Having a lower alcohol content than proof spirit.
from the GNU version of the Collaborative International Dictionary of English
- adj. Containing less alcohol than proof spirit. See Proof spirit, under spirit.
from The Century Dictionary and Cyclopedia
- Having a greater specific gravity than 0.91984: applied to alcoholic liquors.
If it didn't ignite, the solution had too much water in it and the proof was considered low or "underproof".
- Jesus, it's not underproof, he says, screwing the water out of his eyes.
But in some ways he was a kind of Thackeray several degrees underproof -- a small-beer
Multiply the result by the quantity of spirit, and divide the product by the number obtained by _adding_ the _required_ per centage overproof, or _subtracting_ the _required_ per centage underproof, to or from 100, as the case may be.
Thus, spirit of wine at 56 per cent. overproof, signifies that 100 gallons of it are equal to 156 gallons of proof spirit; while a spirit at 20 per cent. underproof, signifies that 100 gallons are equal to 80 gallons at proof.
Summer Edition is a bit underproof compared to regular Beefeater (80 proof, or 40% ABV, instead of 94 proof), but the delicate summer botanicals add a sweetness you might not often find.
_overproof_ per centage _to_ 100, or _subtract_ the _underproof_ per centage _from_ 100.
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