Order

Look up order in Wiktionary, the free dictionary.

Order may refer to:

Common usage

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
Stream order, used to define river networks based on a hierarchy of tributaries
Topological order in quantum mechanics, an organized quantum state

Court order, made by a judge, e.g. a restraining order
Executive order (disambiguation), issued by the executive branch of government
Military order (instruction)
- 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)
Public order crime
Statutory instrument, which includes legislative orders
Tactical formation, an arrangement or deployment of moving military forces
World order (disambiguation), including the concept of a world government

Religious order
Monastic order, established circa 300 AD
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

Chivalric order, established since the middle ages
- Military order, established in the era of the crusades
- Dynastic order of knighthood, conferred by a head of a presently or formerly sovereign royal house
Order (honour)
- Order of merit of a state or other entity
- Ecclesiastical decoration, order or decoration conferred by a head of a denomination
Fraternal order

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

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
ORDER (spacecraft), a space debris removal transport satellite

The Order (group), an underground American neo-Nazi organization active in 1983 and 1984