definition of
rule

[1] #1 rule n. [regulation] a principle or condition that customarily governs behavior; "it was his rule to take a walk before breakfast"; "short haircuts were the regulation". wn

[2] #2 rule n. [convention, normal, pattern, formula] something regarded as a normative example; "the convention of not naming the main character"; "violence is the rule not the exception"; "his formula for impressing visitors". wn

[3] #3 rule v. [govern] exercise authority over; as of nations; "Who is governing the country now?". wn

[4] #4 rule n. [prescript] prescribed guide for conduct or action. wn

[5] #5 rule v. [decree] decide with authority; "The King decreed that all firstborn males should be killed". wn