ruler
noun /ˈruːlə(r)/
  /ˈruːlər/
 - a person who rules or governsExtra ExamplesTopics Politicsb1
- He eventually became ruler over all Egypt.
 - At that time the East India Company was the virtual ruler of Bengal.
 - The country was finally united under one ruler.
 - a ruler who held power for over twenty years
 - an absolute ruler who will tolerate no opposition
 - He established himself as ruler over both tribes.
 - There was a successful coup against the country's military rulers.
 - Vietnam still had strong links with France, the former colonial ruler.
 
Oxford Collocations Dictionaryadjective- great
 - effective
 - good
 - …
 
- under a/the ruler
 - ruler over
 
 - a straight narrow piece of wood, plastic or metal, marked in centimetres or inches, used for measuring or for drawing straight linesTopics Maths and measurementa2, Educationa2
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