Dictionary definition · rule
noun
- a principle or condition that customarily governs behavior"it was his rule to take a walk before breakfast"
- something regarded as a normative example"the convention of not naming the main character"
- prescribed guide for conduct or action
- (linguistics) a rule describing (or prescribing) a linguistic practice
- a basic generalization that is accepted as true and that can be used as a basis for reasoning or conduct"their principles of composition characterized all their works"
- the duration of a monarch's or government's power"during the rule of Elizabeth"
verb
- exercise authority over; as of nations"Who is governing the country now?"
- decide with authority"The King decreed that all firstborn males should be killed"
- be larger in number, quantity, power, status or importance"Money reigns supreme here"
- decide on and make a declaration about"find someone guilty"
- have an affinity with; of signs of the zodiac
- mark or draw with a ruler"rule the margins"
Source: Open English WordNet (CC BY 4.0).