Nearby words

  1. diesinker,
  2. diesis,
  3. diester,
  4. diestock,
  5. diestrus,
  6. diet kitchen,
  7. diet pill,
  8. diet pyramid,
  9. dietary,
  10. dietary amenorrhea

Origin of diet

1175–1225; (noun) Middle English diete < Anglo-French, Old French < Latin diaeta < Greek díaita way of living, diet, equivalent to dia- dia- + -aita (akin to aîsa share, lot); (v.) Middle English dieten (transitive) < Anglo-French, Old French dieter, derivative of the noun

Related formsdi·et·er, nounnon·di·et·er, nounnon·di·et·ing, adjective, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for dieter

British Dictionary definitions for dieter


/ (ˈdaɪət) /


  1. a specific allowance or selection of food, esp prescribed to control weight or in disorders in which certain foods are contraindicateda salt-free diet; a 900-calorie diet
  2. (as modifier)a diet bread
the food and drink that a person or animal regularly consumesa diet of nuts and water
regular activities or occupations


(usually intr) to follow or cause to follow a dietary regimen
Derived Formsdieter, noun

Word Origin for diet

C13: from Old French diete, from Latin diaeta, from Greek diaita mode of living, from diaitan to direct one's own life


/ (ˈdaɪət) /


(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
Scots law
  1. the date fixed by a court for hearing a case
  2. a single session of a court

Word Origin for diet

C15: from Medieval Latin diēta public meeting, probably from Latin diaeta diet 1 but associated with Latin diēs day

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

Word Origin and History for dieter
Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for dieter


[ dīĭt ]


Food and drink in general.
A prescribed course of eating and drinking in which the amount and kind of food, as well as the times at which it is to be taken, are regulated for therapeutic purposes.
Reduction of caloric intake so as to lose weight.


To eat and drink according to a regulated system, especially so as to lose weight or control a medical condition.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.