noun
proof
Alcoholic strength expressed on a proof scale.
The label states that the whiskey is eighty proof.
Etymology
Proof originally concerned testing or demonstrating a quality. Alcohol proof developed from tests of a spirit's strength into a numerical scale expressing it.
More examples
- They compared the proof of the two spirits.
- The distiller checked the proof before bottling.
- This batch has a lower proof than the last.
Forms
proof
Similar words
- strength
- The general degree of alcohol concentration, not a particular proof scale.