Di·et n.
1. Course of living or nourishment; what is eaten and drunk habitually; food; victuals; fare. “No inconvenient diet.”
2. A course of food selected with reference to a particular state of health; prescribed allowance of food; regimen prescribed.
To fast like one that takes diet. --Shak.
Diet kitchen, a kitchen in which diet is prepared for invalids; a charitable establishment that provides proper food for the sick poor.