Order

Look up order in Wiktionary, the free dictionary.

Order frequently refers to orderliness, a desire for organization.

It may also refer to:

Sequences

An arrangement of items in sequence
The result of enumeration of a set of items
Collation, the sequencing and ordering of text
- Alphabetical order
Order of precedence, a sequential hierarchy of the nominal importance of items, often people

Order (business), an instruction from a customer to buy
- Work order, an order received by an organization from a customer or client
Order (exchange), customer's instruction to a stock broker
Money order, a payment order for a pre-specified amount of money

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
Tactical formation, an arrangement or deployment of moving military forces

Order (mathematics), with various meanings
Order, a mathematical structure modeling sequenced items, dealt with in order theory
Order of computation, the computational complexity of an algorithm
Order of hierarchical complexity, quantified by the model of hierarchical complexity, the ordinal complexity of tasks that are addressed
Partially ordered set
- Complete partial order
Ranking
Stochastic ordering of random variables or probability distributions

Implicate and explicate order according to David Bohm
Order and disorder (physics), measured by an order parameter or more generally by entropy
Order, optics, the category number of lighthouse Fresnel lenses, defining size and focal length
Topological order in quantum mechanics, an organized quantum state

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 (biology), a rank between class and family, or a taxon at that rank
ORDER (spacecraft), a space debris removal transport satellite
Order of reaction, a concept of chemical kinetics
Social order in sociology, history and other social sciences, referring to the conduct of society
Stream order, used to define river networks based on a hierarchy of tributaries
Z-order, which graphics cover up others on computer screens

Natural order (philosophy), the moral source from which natural law seeks to derive its authority
Ordered system, the universe or the cosmos, the antithetical concept of chaos

Canonical order, or Canons Regular, a class of religious orders in the Catholic Church
Holy Orders, the rite or sacrament in which clergy are ordained
Monastic order, established circa 300 AD
Order of Mass, the set of texts of the Roman Catholic Church Latin Rite Mass that are generally invariable
Religious order