diet

from The Century Dictionary.

• To provide diet or food for; feed; nourish.
• To prescribe food for; regulate the food or regimen of.
• To eat; feed.
• To eat according to rules prescribed: as, to diet in an attack of dyspepsia.
• noun A meeting, as of dignitaries or delegates, held from day to day for legislative, political, ecclesiastical, or municipal purposes; meeting; session: specifically applied by English and French writers to the legislative assemblies in the German empire, Austria, etc.
• noun The discharge of some part of ministerial duty at a fixed time: as, a diet of examination; a diet of visitation.
• noun An excursion; a journey.
• noun Food and drink; specifically, food considered in relation to its quality and effects: as, milk is a wholesome article of diet.
• noun A course of food regulated by a physician or by medical rules; food prescribed for the prevention or cure of disease, and limited in kind and quantity; dietetic regimen; dietary.
• noun Allowance of provision; supply of food.
• noun Allowance for expenses of living.
• noun Synonyms Subsistence, fare, provision.
• noun Regimen.

from the GNU version of the Collaborative International Dictionary of English.

• intransitive verb obsolete To eat; to take one's meals.
• intransitive verb To eat according to prescribed rules; to ear sparingly.
• transitive verb rare To cause to take food; to feed.
• transitive verb To cause to eat and drink sparingly, or by prescribed rules; to regulate medicinally the food of.
• noun Occasionally, the Reichstag of the German Empire, Reichsrath of the Austrian Empire, the federal legislature of Switzerland, etc.
• noun The legislature of Denmark, Sweden, Japan, or Hungary.
• noun The state assembly or any of various local assemblies in the states of the German Empire, as the legislature (Landtag) of the kingdom of Prussia, and the Diet of the Circle (Kreistag) in its local government.
• noun The local legislature (Landtag) of an Austrian province.
• noun The federative assembly of the old Germanic Confederation (1815 -- 66).
• noun In the old German or Holy Roman Empire, the great formal assembly of counselors (the Imperial Diet or Reichstag) or a small, local, or informal assembly of a similar kind (the Court Diet, or Hoftag).
• noun Course of living or nourishment; what is eaten and drunk habitually; food; victuals; fare.
• noun A course of food selected with reference to a particular state of health; prescribed allowance of food; regimen prescribed.
• noun a kitchen in which diet is prepared for invalids; a charitable establishment that provides proper food for the sick poor.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The food and beverage a person or animal consumes.
• noun countable A controlled regimen of food and drink, as to gain or lose weight or otherwise influence health.
• noun By extension, any habitual intake or consumption.
• noun countable A council or assembly of leaders; a formal deliberative assembly.
• verb transitive To regulate the food of (someone); to put on a diet.
• verb intransitive To modify one's food and beverage intake so as to decrease or increase body weight or influence health.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb follow a regimen or a diet, as for health reasons
• noun a prescribed selection of foods
• noun the usual food and drink consumed by an organism (person or animal)
• verb eat sparingly, for health reasons or to lose weight
• noun a legislative assembly in certain countries (e.g., Japan)
• noun the act of restricting your food intake (or your intake of particular foods)