Definition of proof spirit
: an alcoholic liquor or mixture of ethanol and water that contains 50 percent ethanol by volume at 60°F (16°C)
First Known Use of proof spirit
Medical Definition of proof spirit
1: an alcoholic liquor or mixture of alcohol and water containing 50 percent ethanol by volume at 60° F (15.6° C)
2British : liquor that weighs 12⁄13 of an equal measure of distilled water or contains 57.10 percent by volume of alcohol
Learn More about proof spirit
Medical Dictionary: Definition of "proof spirit"
Seen and Heard
What made you want to look up proof spirit? Please tell us where you read or heard it (including the quote, if possible).