ruler

/ˈrulər/
noun
  1. A person who governs or leads a country, state, or group.
    • The queen was a beloved ruler who reigned for over sixty years.
    • A wise ruler listens to the needs of their citizens.
    • The ancient ruler built temples and roads for the people.
  2. A straight strip of wood, plastic, or metal used for measuring or drawing straight lines.
    • The carpenter measured the board with a metal ruler.
    • Use a ruler to draw a straight line across the page.
    • She lined up the ruler with the edge of the paper before cutting.
Antonyms
What does "ruler" mean? | whatsthatwordmean | whatsthatwordmean