Order may refer to:

Religious

• Holy Orders, the rite or sacrament in which clergy are ordained
• The monastic orders, originating with Anthony the Great and Benedict of Nursia from circa 300
  • the military orders of the crusades
  • the various chivalric orders established since the 14th century

Holy Orders in the modern Roman Catholic Church and in the Eastern Orthodox, Oriental Orthodox, Anglican, Assyrian, Old Catholic, and Independent Catholic Churches, includes three degrees: bishop, priest, and deacon. ... Monasticism (from Greek: monachos—a solitary person) is the religious practice of renouncing all worldly pursuits in order to fully devote ones life to spiritual work. ... A military order is a Christian order of knighthood that is founded for crusading, i. ... See also Orders of Chivalry in the British honours system After the failure of the crusades, the crusading military orders became idealized and romanticized, resulting in the late medieval notion of chivalry, as reflected in the Arthurian romances of the time. ...

Honors

• Order (decoration)

An Order is a decoration, awarded by a government to an individual, usually for distinguished service to a nation or to humanity. ...

Legal and military

• Court order
• Executive order
• General order
• Standing order
• Direct order

A court order is an official proclamation by a judge (or panel of judges) that defines the legal relationships between the parties before the court and requires or authorises the carrying out of certain steps by one or more parties to a case. ... An executive order is an edict issued by a member of the executive branch of a government, usually the head of that branch. ... In militaries, a general order is a published directive, originated by a commander, and binding upon all personnel under his command, the purpose of which is to enforce a policy or procedure unique to his units situation which is not otherwise addressed in applicable service regulations, military law, or... A standing order is a general order of indefinite duration. ...

In scientific classification

• Order (biology)
• social order
• Order (chemistry)

Scientific classification or biological classification refers to how biologists group and categorize extinct and living species of organisms. ... Social order is a concept used in sociology, history and other social sciences. ... Order in the context of a chemical reaction is a concept of reaction kinetics, a subdiscipline of physical chemistry. ...

In mathematics

• ordinal number
• ordered set
• order theory
• total order
• total preorder
• partial order
• order (group theory)
• multiplicative order
• orders of magnitude, factors of ten
• orders of approximation, Big O notation

Commonly, ordinal numbers, or ordinals for short, are numbers used to denote the position in an ordered sequence: first, second, third, fourth, etc. ... ... Order theory is a branch of mathematics that studies various kinds of binary relations that capture the intuitive notion of a mathematical ordering. ... In mathematics, a total order, linear order or simple order on a set X is any binary relation on X that is antisymmetric, transitive, and total. ... In the mathematical area of order theory, a total preorder over a set X is a preorder ≤ over X that is total; that is, for all a and b in X, it holds that a ≤ b or b ≤ a. ... In mathematics, a partially ordered set (or poset for short) is a set equipped with a special binary relation which formalizes the intuitive concept of an ordering. ... In group theory, the term order is used in two closely related senses: the order of a group is its cardinality, i. ... In number theory, given an integer a and a positive integer n with gcd(a,n) = 1, the multiplicative order of a modulo n is the smallest positive integer k with ak ≡ 1 (modulo n). ... An order of magnitude is the class of scale or magnitude of any amount, where each class contains values of a fixed ratio to the class preceding it. ... Often in science, engineering, or other quantitative disciplines, it is necessary to make approximations with various degrees of precision. ...

In computer science

• canonical order

In computing, a canonical order is the order of elements that obeys a certain set of rules or specifications. ...

Miscellaneous

• Collating order
• Order (philosophy)
• Order (business)
• Architectonic orders: see classical order
• The Order

In textual criticism and bibliography, collation is the reading of two (or more) texts side-by-side in order to note their differences. ... Order: Yes lets not get off the fact that the Americans are unhealthely ignorant, and have no care for the minorities in the world. ... A refined canonic version of the Orders engraved for the Encyclopédie, vol. ... The Order can refer to: The Order (group) The Order (movie) The Order of the Phoenix — the fifth book in the Harry Potter series This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ...

See also

• ordinal
• ordinate
• ordination
• coordination
• subordinate