The school has a strict rule about attendance.

The ruling party won the election

As a rule, students are not allowed to use their phones during class.

The country is ruled by an oligarchical government.

The suspect has been ruled out as a potential suspect in the case.

I will rule out that option.

I used a slide rule to calculate the measurements.

The city council is discussing the implementation of home rule.

The ground rule for this stadium is that any ball hit into the stands is considered a home run.

During the labor dispute, the employees decided to engage in a work-to-rule campaign.