diet

noun7

1. •
   the usual meals and drinks of a person or an animal

   • The diet of the giant panda consists mainly of bamboo.
2. •
   Any habitual intake or consumption.

   • He's been reading a steady diet of nonfiction for the last several years.
3. •
   A controlled regimen of food and drink choices, as to gain or lose weight or otherwise influence health.

   • He's been on a diet since he found out that he has coronary atherosclerosis.
   • The doctor put me on a low-salt diet.
4. •
   A council or assembly of leaders; a formal deliberative assembly.

   • They were given representation in some important diet committees.
5. •
   (Scotland) A session of exams.

   • Normally the diet begins towards the end of April. — 2020
6. •
   A criminal proceeding in court.
7. •
   (Scotland) A clerical or ecclesiastical function in Scotland.

verb4

1. •
   To modify one's food and beverage intake so as to decrease or increase body weight or influence health.

   • I've been dieting for six months, and I've lost some weight.
2. •
   (old-fashioned) To regulate the food of (someone); to put on a diet.

   • they will diet themselves, feed and live alone.
3. •
   (no longer used) To eat; to take one's meals.

   • Let him[…]diet in such places, where there is good company of the nation, where he travelleth. — 1625
4. •
   (no longer used) To cause to take food; to feed.

   • But partly led to diet my revenge […]. — 1603

adjective2

1. •
   Containing less fat, salt, sugar, or calories than normal, or claimed to have such.

   • Many grocery chains offer premium-priced lean or diet hamburger; but the fat content is usually at least 10 percent, sometimes 15 percent or more. — 1982
2. •
   (informal, figurative) Having certain traits subtracted.

   • You folks reduce it to the bible only as being authoritative, impoverishing the faith. "Christianity Lite", diet Christianity for those who can't handle the Whole Meal.

noun1

1. •
   Abbreviation of direct interspecies electron transfer.