(a.) That which is prescribed or laid down as a guide for conduct or action; a governing direction for a specific purpose; an authoritative enactment; a regulation; a prescription; a precept; as, the rules of various societies; the rules governing a school; a rule of etiquette or propriety; the rules of cricket.
RULE
Meaning of RULE in English
Webster's English dictionary. Английский словарь Webster. 2012