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rule: Wikis

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A rule is:

  • Rewrite rule, in generative grammar and computer science
  • Standardization, a formal and widely-accepted statement, fact, definition, or qualification
  • Operation, a determinate rule (method) for performing a mathematical operation and obtaining a certain result (Mathematics, Logic)
  • Rule of inference, a function from sets of formulae to formulae (Mathematics, Logic)
  • Rule of thumb, principle with broad application that is not intended to be strictly accurate or reliable for every situation. Also often simply referred to as a rule
  • Moral, an atomic element of a moral code for guiding choices in human behavior
  • Heuristic, a quantized "rule" which shows a tendency or probability for successful function
  • A regulation, as in sports
  • A Production rule, as in computer science
  • Procedural law, a ruleset governing the application of laws to cases
    • A law, which may informally be called a "rule"
    • A court ruling, a decision by a court
  • In the U.S. Government, a regulation mandated by Congress, but written or expanded upon by the Executive Branch.
  • Norm (sociology), an informal but widely accepted rule, concept, truth, definition, or qualification (social norms, legal norms, coding norms)
  • Norm (philosophy), a kind of sentence or a reason to act, feel or believe
  • "Rulership" is the concept of governance by a government:
    • Military rule, governance by a military body
    • Monastic rule, a collection of precepts that guides the life of monks or nuns in a religious order where the superior holds the place of Christ
  • Slide rule

Other uses

  • "Rule," a song by Ayumi Hamasaki
  • "Rule," a song by rapper Nas
  • "Rules," an album by the band The Whitest Boy Alive
  • Rules: Pyaar Ka Superhit Formula, a 2003 Bollywood film
  • ruler, an instrument for measuring lengths
  • Rule, a component of an astrolabe, circumferator or similar instrument
  • The Rules, a bestselling self-help book
  • RULE Project (Run Up-to-date Linux Everywhere), a project that aims to use up-to-date Linux software on old PCs
  • Rule engine, a software system that helps managing business rules
  • Ja Rule, a hip hop artist
    • R.U.L.E., a 2005 greatest hits album by rapper Ja Rule
  • "Rules," a KMFDM song

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Up to date as of January 15, 2010

Definition from Wiktionary, a free dictionary



Wikipedia has articles on:







rule (plural rules)

  1. A regulation, law, guideline.
  2. A ruler; device for measuring, a straightedge, a measure.
  3. Something to keep order.

Derived terms

Related terms



to rule

Third person singular

Simple past

Past participle

Present participle

to rule (third-person singular simple present rules, present participle ruling, simple past and past participle ruled)

  1. To regulate, be in charge of, make decisions for, reign over.
  2. (slang, intransitive) To excel.
    This game rules!


Derived terms

External links

  • rule in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913
  • rule in The Century Dictionary, The Century Co., New York, 1911


  • Anagrams of elru
  • lure

Simple English

Simple English Wiktionary has the word meaning for:

When something always does the same thing, one can say that there is a rule that it does what it does.

The word "rule" has many uses, including the following:

A means of measurement (such as a slide rule.)
A law or regulation.
A precedent or conclusion drawn from experiments.

A "rule" in mathematics is a formula which allows a person to work out a sum if he or she has certain information. For example, Pythagoras' theorem is a rule which states that if a person knows the lengths of two sides of a right-angled triangle he or she can work out the length of the third.

Rules, however, can also means laws created by people in power - for example, school rules are the "laws" of a specific school.

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