Dictionary

A regulation, law, guideline.

Example: All participants must adhere to the rules.

A ruler; device for measuring, a straightedge, a measure.

A straight line (continuous mark, as made by a pen or the like), especially one lying across a paper as a guide for writing.

A regulating principle.

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

To excel.

Example: This game rules!

To mark (paper or the like) with rules (lines).

To decide judicially.

Revelry.

To revel.