|  | 
Definition of Pruno
1. Noun. A liquor concocted from a mixture of ingredients (such as prunes and raisins and milk and sugar) that can be fermented to produce alcohol; made by prison inmates. 
|  | 
1. Noun. A liquor concocted from a mixture of ingredients (such as prunes and raisins and milk and sugar) that can be fermented to produce alcohol; made by prison inmates.