110-proof meaning

(US) Used other than as an idiom: 55% alcohol by volume..
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(idiomatic) Stronger than strong.
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Origin of 110-proof

  • Most hard liquor sold at retail in the United States is between 80 and 95 proof. (Bootlegged whiskey can be much stronger.) So 110 proof is quite strong.

    From Wiktionary

  • See proof.

    From Wiktionary