- containing a high percentage of alcohol: high-proof spirits.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for high-proof
It turned out that my water was high-proof gin; yet this draught had no more effect on me than if it had been so much cold water.Ned Myers
James Fenimore Cooper
Nitric acid will detect if there is cobalt in the lead, by adding to the acid half the quantity of high-proof alcohol.Reminiscences of Glass-making
To prevent fermentation, stir in a teacupful of high-proof California brandy.Clayton's Quaker Cook-Book
H. J. Clayton