rule

noun1 of 2

statement that says how things should be

• “It's hard to remember all these rules, but it's necessary.”Tatoeba
• “The size of the board does not affect the rules.”Tatoeba

Sentences from Tatoeba show real usage. A word can have several meanings, so a sentence may use another one.

verb2 of 2

To regulate, be in charge of, make decisions for, reign over.