D defs.my
Entry 1 sense Webster, 1913

Overproof

/ō'vər-pro͞of′/ · O·ver·proof · IPA /ˌoʊvɚˈpɹuf/
01 a. Containing more alcohol than proof spirit; stronger than proof spirit; that is, containing more than 49.3 per cent by weight of alcohol.
  1. 1.
    Containing more alcohol than proof spirit; stronger than proof spirit; that is, containing more than 49.3 per cent by weight of alcohol.