An official regulation or law.

• A guideline governing behavior or procedure.

To exercise authority over; govern.

• To be in charge of or control.

To issue a formal decision, especially in court.

• To decide a point in a legal or official context.

A general principle or method for doing something.

• A formula or instruction that produces a result.

What normally happens; the usual state.

• A prevailing condition with few exceptions.

A straight-edged measuring device; a ruler.

• A tool for drawing or checking straight lines.

To mark paper with straight lines.

• To add ruled lines to a surface.

A straight line used as a writing or printing guide.

• A thin printed line separating text or columns.