proof spirit

proof spirit

noun \ˈprüf-\

Definition of PROOF SPIRIT

: an alcoholic liquor or mixture of alcohol and water containing 50 percent ethanol by volume at 60° F (15.6° C)
British : liquor that weighs {frac12/13} of an equal measure of distilled water or contains 57.10 percent by volume of alcohol

Seen & Heard

What made you want to look up proof spirit? Please tell us where you read or heard it (including the quote, if possible).