proof spirit proof sheet • proofy · · · Info · Definitions · Characters · · proof spirit · · Text Common · · Latin · · Scripts 12 · · Length 3 · · Syllables Definitions · · · (noun) a mixture containing half alcohol by volume at 60 degrees Fahrenheit. Synonyms: proof spirit. · · Noun Definition 1 Characters · · space U+0020 f latin small letter f U+0066 i latin small letter i U+0069 o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074