Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “ruler”

See all translations

ruler

noun [C] uk   /ˈruː.lər/ us    /-lɚ/

ruler noun [C] (LEADER)

C1 the leader of a country: The country was without a ruler after the queen died.

ruler noun [C] (FOR DRAWING)

A2 ( old-fashioned or formal rule) a long, narrow, flat piece of plastic, metal, or wood with straight edges where centimetres or inches, or both are printed. It is used for measuring things and for drawing straight lines.
(Definition of ruler from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of ruler?
Add Cambridge dictionaries to your browser to your website

Definitions of “ruler” in other dictionaries

Word of the Day

illusion

an idea or belief that is not true

Word of the Day

Lies, lies, lies!

by Kate Woodford,
February 25, 2015
​​​ According to sociologists (=people who study the relationships between people living in groups), we are good at lying. As a species, we have developed a remarkable ability to deceive each other (= persuade each other that something false is true). Being able to say things that are not true can help with

Read More 

showrooming noun

February 23, 2015
the activity of examining a product in a physical store and then making the purchase with an online retailer Amazon’s new smartphone is specifically designed to make showrooming fast and easy.

Read More