diet diet /ˈdaɪət/

noun

1. () A prescribed selection of foods  ( diet )
   a prescribed selection of foods
     She followed a strict diet to maintain a healthy weight and improve her overall well-being.
   She followed a strict diet to maintain a healthy weight and improve her overall well-being.
   
   
2. The act of restricting your food intake (or your intake of particular foods)  ( diet , dieting )
   the act of restricting your food intake (or your intake of particular foods)
   
   
3. The usual food and drink consumed by an organism (person or animal)  ( diet )
   the usual food and drink consumed by an organism (person or animal)
    A balanced diet is essential for maintaining good health.
   A balanced diet is essential for maintaining good health.
   
   
4. A legislative assembly in certain countries (e.g., Japan)  ( diet )
   a legislative assembly in certain countries (e.g., Japan)
   

verb

1. Eat sparingly, for health reasons or to lose weight  ( diet )
   eat sparingly, for health reasons or to lose weight
   
2. Follow a regimen or a diet, as for health reasons  ( diet )
   follow a regimen or a diet, as for health reasons
    He has high blood pressure and must stick to a low-salt diet
   He has high blood pressure and must stick to a low-salt diet