Define ruler.

Understand the Problem

The question is asking for the definition of the term 'ruler', which can refer to a tool used for measuring lengths or to a person who governs or leads a community or country.

Answer

A tool used to measure distances or draw straight lines.

A ruler is a tool used to measure distances or to draw straight lines.

Answer for screen readers

A ruler is a tool used to measure distances or to draw straight lines.

More Information

Rulers were among the earliest measuring tools used by ancient civilizations and are still widely used today in various fields like carpentry, engineering, and education.

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