diet Definition in the Cambridge English Dictionary
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Definition of “diet” - English Dictionary

Definition of "diet" - American English Dictionary

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dietnoun [C/U]

 us   /ˈdɑɪ·ɪt/
the ​food and ​drink usually taken by a ​person or ​group: [C] A ​healthy diet ​includesfreshvegetables. [C] fig. Gifted ​students given a ​steady diet of grade-level ​curriculumlearn they don’t need to ​work hard. A diet is also the ​particularfood and ​drink you are ​limited to when you cannot ​eat or ​drink whatever you ​want to: [C] a low-salt diet [C] I’m going on a diet because I’ve got to ​lose some ​weight.
dietary
adjective  us   /ˈdɑɪ·ɪˌter·i/
Health ​experts say dietary ​changes have to ​start with ​children, who can be ​taught to ​appreciate a ​healthy diet.

dietverb [I]

 us   /ˈdɑɪ·ɪt/
to ​limit the ​food that you take, esp. in ​order to ​loseweight: He ​began dieting a ​month ago and says he has ​lost ten ​pounds already.
dieter
noun [C]  us   /ˈdɑɪ·ɪ·t̬ər/
Studies show there may be as many as 30 million American dieters at any one ​moment.

dietadjective [not gradable]

 us   /ˈdɑɪ·ɪt/
(of ​food or ​drink) ​containing much less ​sugar than ​usual and often sweetened ​artificially, or ​containing less ​fat than ​usual: diet ​soda
(Definition of diet from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "diet" - British English Dictionary

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dietnoun

uk   us   /ˈdaɪ.ət/
B1 [C or U] the ​food and ​drink usually ​eaten or ​drunk by a ​person or ​group: Diet ​varies between different ​countries in the ​world. a healthy/​balanced/​varied diet Rice is the staple diet (= most ​importantfood) of many ​people in ​China. The ​childrenseem to ​exist on a diet offriedfood.B1 [C] an ​eatingplan in which someone ​eats less ​food, or only ​particulartypes of ​food, because they ​want to ​becomethinner or for ​medicalreasons: I'm going on a diet next ​week and ​hope to ​lose ten ​pounds before ​Christmas. a crash/​strict/​calorie-controlled diet The ​doctor put me on a low-salt diet to ​reduce my ​bloodpressure. [S] a ​particulartype of thing that you ​experience or do ​regularly, or a ​limitedrange of ​activities: He was ​brought up on a diet ofpoliticalpropaganda from ​birth. Network TV only ​offers a diet ofbadrealityshows every ​night.
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dietadjective [before noun]

uk   us   /ˈdaɪ.ət/
Diet ​food or ​drinkcontains less ​sugar or ​fat than the ​usualtype, and often ​contains an ​artificial sweetener: diet ​cola

dietverb [I]

uk   us   /ˈdaɪ.ət/
to ​limit the ​food and/or ​drink that you have, ​especially in ​order to ​loseweight: You should be ​able to ​reduceyourweight by ​careful dieting.
(Definition of diet from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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“diet” in American English

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hyperpalatable adjective
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describes food with heightened levels of sugar and salt, intended to be extremely appealing In Brazil, where the prevalence of overweight and obese adults has doubled since 1980, crisps, biscuits, energy bars and sugary drinks formulated to be ‘hyper-palatable’ are much more widely eaten than previously.

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