For the rules of Simple English Wiktionary, see WT:Rules.
rule is on the Basic English 850 List.
rub - rule - run
rule is one of the 1000 most common headwords.
round - rule - run
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Pronunciation

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Singular
rule

Plural
rules

Rule is on the Academic Vocabulary List.
  1. (countable) A rule is a statement that tells whether something is right or wrong.
    Peter picked up the football, which was against the rules, so the other team got a throw-in.
  2. (countable & uncountable) A king's rule is the time he controls the country.
    The next king had a very short rule: only two years.
  3. (countable) A rule is another name for a ruler, a measuring device.

Plain form
rule

Third-person singular
rules

Past tense
ruled

Past participle
ruled

Present participle
ruling

  1. When someone rules, he or she is in charge, like a king or queen.
    The king has ruled for 33 years.
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see 1