Definitions from Wiktionary ( )

▸ noun:  Effective management of a community or system, or especially its resources.
▸ noun:  (obsolete) The regular operation of nature in the generation, nutrition and preservation of animals or plants.
▸ noun:  (obsolete) System of management; general regulation and disposition of the affairs of a state or nation, or of any department of government.
▸ noun:  (obsolete) A system of rules, regulations, rites and ceremonies.
▸ noun:  (obsolete) The disposition or arrangement of any work.
▸ noun:  The study of money, currency and trade, and the efficient use of resources.
▸ noun:  Frugal use of resources.
▸ noun:  The system of production and distribution and consumption. The overall measure of a currency system; as the national economy.
▸ noun:  (theology) The method of divine government of the world. (See Economy (religion).)
▸ noun:  (US) The part of a commercial passenger airplane or train reserved for those paying the lower standard fares; economy class.
▸ noun:  (archaic) Management of one’s residency.
▸ adjective:  Cheap to run; using minimal resources; representing good value for money; economical.
▸ adverb:  (US) In or via the part of a commercial passenger airplane reserved for those paying the lower standard fares.

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