food and drink considered in terms of its qualities, composition, and its effects on health: The ad shows milk and dairy as a wholesome part of our daily diet.
a particular selection of food, especially as designed or prescribed to improve a person's physical condition or to prevent or treat a disease: A diet low in sugar is often recommended for diabetes prevention.
a selection of food that emphasizes caloric restriction or otherwise limits the amount a person eats, usually intended to induce weight loss: No pie for me, I'm on a diet.
the foods eaten, as by a particular person or group: The Mediterranean diet consists historically of fish, fruit, vegetables, whole grains, and nuts.
food or feed habitually eaten or provided: The rabbits were fed a diet of carrots and lettuce.
anything that is habitually provided or partaken of: Television has given us a steady diet of reality shows and police procedurals.
suitable for consumption as part of a selection of food intended to induce weight loss: I usually drink diet soft drinks.
formulated to be lower in calories, fat, sugar, etc. than a similar food: The diet version of the cookie does taste different.
to select or limit the food one eats to improve one's physical condition or to lose weight: I've dieted all month and lost only one pound.
to eat or feed according to the requirements of a particular or prescribed selection of food.
to regulate the food of, especially in order to improve the physical condition: They dieted the dog to a healthy weight of 20 pounds.
- di·et·er, noun
- non·di·et·er, noun
- non·di·et·ing, adjective, noun
Other definitions for diet (2 of 2)
the legislative body of certain countries, as Japan.
the general assembly of the estates of the former Holy Roman Empire.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use diet in a sentence
He trains like a professional athlete in any other sport, with early-morning gym sessions, a diet of healthful foods and all-day practice.
Rather than revamp the industry, these critics suggest alternatives such as meat-free diets to fulfill our need for protein.Biotechnology Could Change the Cattle Industry. Will It Succeed? | Dyllan Furness | August 16, 2020 | Singularity Hub
In some cases, bacteria could even use these electrons to fuel growth in much the same way that humans use electrons from carbohydrates in the diet for energy.Scientists stumbled across the first known manganese-fueled bacteria | Carolyn Beans | July 21, 2020 | Science News
As a snapshot of the dino’s diet, the gut contents “can tell us more about dinosaur behavior,” Chin says.
Some of the data that scientists have about dinosaur diets comes from coprolites.
Park employees helped John quit tobacco by way of a butts-proof glass enclosure, a drastic change in diet, and regular exercise.Zebra Finches, Dolphins, Elephants, and More Animals Under the Influence | Bill Schulz | December 31, 2014 | THE DAILY BEAST
There was also the grapefruit diet, the cabbage soup diet, and the cookie diet.
Still other people have moved away from the word “diet” altogether.
Limbaugh makes comments like this because his right-wing fans require a non–stop diet of race-baiting red meat.
“Butter has always been a healthy part of the diet in almost every culture; butter is a traditional food,” Asprey says.Bulletproof Coffee and the Case for Butter as a Health Food | DailyBurn | December 27, 2014 | THE DAILY BEAST
Excretion of these substances is greatly increased by a diet rich in nuclei, as sweetbreads and liver.A Manual of Clinical Diagnosis | James Campbell Todd
I'm not enamored of a straight meat diet as a rule, but that evening I was in no mood to carp at anything half-way eatable.Raw Gold | Bertrand W. Sinclair
The stools of infants are yellow, owing partly to their milk diet and partly to the presence of unchanged bilirubin.A Manual of Clinical Diagnosis | James Campbell Todd
The poor fellow's health so gave way under this meagre diet, that he died before his course of study was finished.Friend Mac Donald | Max O'Rell
"I don't suppose any Frenchman is given to cannibalistic diet," he answered, smiling.The Doctor of Pimlico | William Le Queux
British Dictionary definitions for diet (1 of 2)
a specific allowance or selection of food, esp prescribed to control weight or in disorders in which certain foods are contraindicated: a salt-free diet; a 900-calorie diet
(as modifier): a diet bread
the food and drink that a person or animal regularly consumes: a diet of nuts and water
regular activities or occupations
(usually intr) to follow or cause to follow a dietary regimen
- dieter, noun
British Dictionary definitions for diet (2 of 2)
(sometimes capital) a legislative assembly in various countries, such as Japan
Also called: Reichstag (sometimes capital) the assembly of the estates of the Holy Roman Empire
the date fixed by a court for hearing a case
a single session of a court
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012