Order may refer to:

Honors

• Order (decoration), medal or award

Religious, chivalric, fraternal, and ideological

• Chivalric order, established since the 14th century
• Fraternal order
• Holy Orders, the rite or sacrament in which clergy are ordained
• Military order, established in the crusades
• Monastic order, established since circa 300 AD
• Religious order
• Order (organization), an organization of people united by a common fraternal bond or social aim
• Tariqa or Sufi Order
• A Cardassian military unit in the fictional Star Trek universe
• An Order of the Mishnah, the name given to a sub-division of the Mishnah, a major religious text
• The Order of the Mass is the set of texts of the Roman Catholic Church Latin Rite Mass that are generally invariable.
• The Order (group), an underground American neo-Nazi organization active in 1983 and 1984.

Legal, political, and military

• Court order, made by a judge; a restraining order, for example, is a type of injunction
• Executive order, issued by the executive branch of government
• General order, a published directive from a commander
• Law and order (politics)
• Social order, referring to the conduct of society
• Standing order, a general order of indefinite duration, and similar ongoing rules in a parliament
• World order, including the concept of a world government

In economics and commerce

• Money order
• Order (business), an instruction from a customer to buy
• Order (exchange), customer's instruction to a stock broker
• Order of degrees in the Elliott wave principle

In science

• Order (biology), a rank between class and family, or a taxon at that rank
• Order of reaction, a concept of chemical kinetics
• Order (crystal lattice) an arrangement of composition, spin, magnetism, etc. in a crystal lattice.
• Order of hierarchical complexity, the ordinal complexity of tasks that are addressed
• Social order, a concept used in sociology, history and other social sciences
• Topological order, an organized quantum state
• An order parameter in physics has value 1 for complete order and value 0 for complete disorder
• The contrary of chaos, disorder (in the sense of randomness), or entropy
• A way of categorizing the size of lighthouse Fresnel lenses

In mathematics

In computer science

• Computational complexity theory, aka order of computation, describes complexity or scalability in computational complexity theory and Big O notation
• Order (information processing), a measure of the number of objects or sub-systems in a system
• Ordered activities in metamodeling
• Ordered or unordered data in data synchronization
• Ordered list is an HTML element
• Canonical order, the order of elements that obeys a certain set of rules or specifications
• Z-order on computer screens

In electronics and telecommunications

• First-order hold in signal processing
• Modulation order, the number of different symbols that can be sent using a given modulation
• Way of categorizing Electronic filters by steepness, see Filter design and Elliptic filter

In architecture and urban planning

• Architectonic orders: see classical order
• Public order, a concept in urban planning

Miscellaneous

• Collation, the sequencing and ordering of text in alphabetical or Lexicographical order
• Implicate and Explicate Order, as defined by David Bohm
• Orders (film), a 1974 film by Canadian filmmaker, Michel Brault

See also

• Collation (disambiguation)
• Coordination
• Ordinal
• Ordinate
• Ordination
• Subordinate

Order has many meanings:

Religious

• Holy orders are the rites or sacraments in which priests are ordained.
• Monastic order refers to a group of people that live together, and share some ideals.

Honors

• Order (decoration), an award or medal

Legal and military

• Court order, made by a judge
• Executive order, issued by the executive branch of government
• General order, a published directive from a commander
• Standing order, a general order of unset duration, and similar ongoing rules in a parliament
• Direct order

In scientific classification

• Order (biology), a rank between class and family, or a taxon at that rank
• Social order, a concept used in sociology, history and other social sciences
• Order (chemistry), a concept of chemical kinetics

In mathematics

• Order (group theory), the cardinality of a group
• Order theory, a branch of mathematics that studies many different kinds of binary relations called orders
• Order (ring theory), a kind of an algebraic structure
• Orders of approximation, Big O notation
• Orders of magnitude, a class of scale or magnitude of any amount
• Order, or degree of a polynomial.

In computer science

• Canonical order, the order of elements that follows a certain rules or specifications

In telecommunications

• Modulation order, the number of different symbols that can be sent using a given modulation

Miscellaneous

• The opposite of chaos, disorder (in the sense of randomness), or entropy
• Collating order, sequence for text, such as alphabetical
• Order (business), an instruction from a customer to buy
• Order (exchange), customer's instruction to a stock broker
• Order (information processing), a measure of the number of objects or sub-systems in a system
• Order (organization), an organization of people united by a common fraternal bond or social aim.
• Architectonic orders
• Way of categorizing Electronic filters by steepness
• Way of categorizing the size of lighthouse Fresnel lenses
• "The Order"
• Order (food), a customer's choice of food at a restaurant or for delivery