Ruler

/ˈruːlər/

Meaning & Definition

noun

A person who governs a country or region, especially a monarch.

The ruler of the kingdom decreed new laws to improve the lives of his subjects.

A measuring instrument used to measure distances or to draw straight lines.

She used a ruler to ensure the lines on her graph were straight.

A person who exercises control or authority over others.

As a ruler in his company, he made decisions that affected all employees.

From Middle English 'ruler', from Old French 'ruler', from Latin 'regulare' meaning 'to direct, guide'.

ruler of the roost

The person who is in charge or has control over a situation or group.

line of a ruler

Referring to a straight line or measurement, often indicating precision.

sovereign

A supreme ruler, especially a monarch.

governor

An official who is in charge of a specific political division.

Top dog

He's the top dog in this company.

Big cheese

She’s the big cheese around here.