Definitions
1.NounA regulation, law, guideline."All participants must adhere to the rules.; You have to follow the rules to enter the qualifiers for the football tournament."
2.NounA regulating principle.
3.NounThe act of ruling; administration of law; government; empire; authority; control.
4.NounA normal condition or state of affairs."My rule is to rise at six o'clock.; As a rule, our senior editors are serious-minded."
5.NounConduct; behaviour.
6.NounAn order regulating the practice of the courts, or an order made between parties to an action or a suit.
7.NounA determinate method prescribed for performing any operation and producing a certain result."a rule for extracting the cube root"
8.NounA ruler; device for measuring, a straightedge, a measure.
9.NounA straight line (continuous mark, as made by a pen or the like), especially one lying across a paper as a guide for writing.
10.NounA thin plate of brass or other metal, of the same height as the type, and used for printing lines, as between columns on the same page, or in tabular work.
11.VerbTo regulate, be in charge of, make decisions for, reign over.
12.VerbTo excel."This game rules!"
13.VerbTo decide judicially.
14.VerbTo establish or settle by, or as by, a rule; to fix by universal or general consent, or by common practice.
15.VerbTo mark (paper or the like) with rules (lines).
16.NounRevelry.
17.VerbTo revel.