Definition of diet

• n. - Course of living or nourishment; what is eaten and drunk habitually; food; victuals; fare.
• n. - A course of food selected with reference to a particular state of health; prescribed allowance of food; regimen prescribed.
• v. t. - To cause to take food; to feed.
• v. t. - To cause to eat and drink sparingly, or by prescribed rules; to regulate medicinally the food of.
• v. i. - To eat; to take one's meals.
• v. i. - To eat according to prescribed rules; to ear sparingly; as, the doctor says he must diet.
• n. - A legislative or administrative assembly in Germany, Poland, and some other countries of Europe; a deliberative convention; a council; as, the Diet of Worms, held in 1521.