名詞 diet:

1. a prescribed selection of foods
2. a legislative assembly in certain countries (e.g., Japan)
3. the usual food and drink consumed by an organism (person or animal)
4. the act of restricting your food intake (or your intake of particular foods)
   同義詞：dieting

動詞 diet:

1. follow a regimen or a diet, as for health reasons
2. eat sparingly, for health reasons or to lose weight

1. You should eat more high-protein diet.
   你應(yīng)該多吃些高蛋白食物。
2. I'm on a diet.
   我正在節(jié)食。
3. Her diet restricts her to 1500 calories a day.
   她的規(guī)定飲食限制她每天攝入1500卡的熱量。
4. The doctor put me on a very strict diet.
   醫(yī)生嚴格限制我的飲食。
5. He is on a diet to reduce some weight.
   他正在節(jié)食以減輕體重。
6. Proper diet and exercise are both important for health.
   適當?shù)娘嬍澈瓦\動對身體健康都很重要。

diet

n.（名詞）
The usual food and drink of a person or animal.
飲食：人或動物的日常的飲食
A regulated selection of foods, especially as prescribed for medical reasons.
特種飲食：尤指給予（病人）規(guī)定的飲食
Something used, enjoyed, or provided regularly:
定期食品：有規(guī)律使用、享受或提供的東西：
例句：
subsisted on a diet of detective novels during his vacation.
在他旅行時一直在靠偵探小說度日

v.（動詞）
di.et.ed,di.et.ing,di.ets
v.intr.（不及物動詞）
To eat and drink according to a regulated system, especially so as to lose weight or control a medical condition.
進規(guī)定的飲食：吃規(guī)定的飲食，尤其指減肥或調(diào)整健康情況
v.tr.（及物動詞）
To regulate or prescribe food and drink for.
為…節(jié)制或規(guī)定飲食

來源：
Middle English diete
中古英語 diete
from Old French
源自 古法語
from Latin diaeta [way of living, diet]
源自 拉丁語 diaeta [生活方式，飲食]
from Greek diaita
源自 希臘語 diaita

【引伸】
di.eter
n.（名詞）

---------------另--------------
diet
diet 2

n.（名詞）
A national or local legislative assembly in certain countries, such as Japan.
議會：某些國家的國家或當?shù)氐牧⒎C關(guān)，例如日本
A formal general assembly of the princes or estates of the Holy Roman Empire.
神圣羅馬帝國的三政會：神圣羅馬帝國的王孫或該階層的正式的一般議會

來源：
Middle English diete [day`s journey, day for meeting, assembly]
中古英語 diete [旅游日，開會日，集合]
from Medieval Latin diôta
源自 中世紀拉丁語 diôta
alteration influenced by Latin diôs [day] * see deiw-
受 拉丁語 diôs的影響 [天] *參見 deiw-
of Latin diaeta [daily routine] * see diet
拉丁語 diaeta的變化 [每日慣例] *參見 diet