Order may refer to:
Sequencing
Contents
- An arrangement of items in sequence
- The result of enumeration of a set of items
- Collation, the sequencing and ordering of text
- Order of precedence
- A mathematical structure modeling sequenced items, dealt with in order theory
- Ranking
- Partially ordered set
Philosophy
Science and mathematics
- Order (mathematics), various meanings
- Order (biology), a rank between class and family, or a taxon at that rank
- Order (optics), the category number of lighthouse Fresnel lenses, defining size and focal length
- Order and disorder (physics), measured by an order parameter or more generally by entropy
- Ordered system or universe, the cosmos, antithetical concept of chaos
- Order of hierarchical complexity, quantified by the Model of Hierarchical Complexity, the ordinal complexity of tasks that are addressed
- Order of reaction, a concept of chemical kinetics
- Social order in sociology, history and other social sciences, referring to the conduct of society
- Stochastic ordering of random variables or probability distributions
- Topological order in quantum mechanics, an organized quantum state
Computer science
- Order of computation, the computational complexity of an algorithm
- Canonical order (disambiguation), the order of elements that obeys a certain set of rules or specifications
- Z-order, which graphics cover up others on computer screens
Electronics and telecommunications
- First-order hold in signal processing
- Modulation order, the number of different symbols that can be sent using a given modulation
- The polynomial order of a Filter (signal processing) transfer function
Economics and commerce
- Order (business), an instruction from a customer to buy
- Order (exchange), customer's instruction to a stock broker
- Money order
- Work order
Legal, political, and military
- Court order, made by a judge, e.g. a restraining order
- Executive order (disambiguation), issued by the executive branch of government
- General order, a published directive from a commander
- Standing order (disambiguation), a general order of indefinite duration, and similar ongoing rules in a parliament
- Law and order (politics)
- Tactical formation, an arrangement or deployment of moving military forces
- World order (disambiguation), including the concept of a world government
Architecture and urban planning
- Architectonic orders: see classical order
- Public order, a concept in urban planning
Honors
- Order (honour), medal or award
Religious, chivalric, fraternal, and ideological
- The Order (group), an underground American neo-Nazi organization active in 1983 and 1984
- Chivalric order, established since the 14th century
- Fraternal order
- Religious order
- Monastic order, established circa 300 AD
- Military order, established in the crusades
- Tariqa or Sufi Order
- Holy Orders, the rite or sacrament in which clergy are ordained
- Order of Mass, the set of texts of the Roman Catholic Church Latin Rite Mass that are generally invariable
Media and entertainment
- Order (album), 2009 album by German band Maroon
- Orders (film), a 1974 film by Canadian filmmaker, Michel Brault
- The Order of Odd-Fish, a 2008 children's novel by James Kennedy
See also
- Collation (disambiguation)
- Coordination (disambiguation)
- Ordinal (disambiguation)
- Ordinate in mathematics, the y element of an ordered pair (x, y)
- Ordination, process by which individuals are consecrated
- Subordinate