2
: a worker or a machine that rules paper
3
: a smooth-edged strip (as of wood or metal) that is usually marked off in units (such as inches) and is used as a straightedge or for measuring
Examples of ruler in a Sentence
a summit attended by a number of rulers from around the world
This ruler shows inches and centimeters.
Recent Examples on the Web
The fall equinox marks the sun’s ingress (your celestial ruler) into Libra, which means, on top of feeling energized, opportunities for charming and harmonious exchanges are more likely at this time.
—
Valerie Mesa, PEOPLE, 21 Sep. 2025
Along the walls of the intriguing altar are 16 rulers.
—Maria Mocerino, Interesting Engineering, 21 Sep. 2025
Park is particularly drawn to the unique linguistic divide of Joseon society, where rulers used traditional Chinese characters while common people used Hangul.
—Naman Ramachandran, Variety, 21 Sep. 2025
Kōnane was once a national pastime, played by peasants and rulers alike.
—Matt Negrin, Rolling Stone, 20 Sep. 2025
See All Example Sentences for ruler
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Valerie Mesa, PEOPLE, 21 Sep. 2025
Along the walls of the intriguing altar are 16 rulers.
—Maria Mocerino, Interesting Engineering, 21 Sep. 2025
Park is particularly drawn to the unique linguistic divide of Joseon society, where rulers used traditional Chinese characters while common people used Hangul.
—Naman Ramachandran, Variety, 21 Sep. 2025
Kōnane was once a national pastime, played by peasants and rulers alike.
—Matt Negrin, Rolling Stone, 20 Sep. 2025
See All Example Sentences for ruler
Cite this Entry
“Ruler.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ruler. Accessed 23 Sep. 2025.
Copy CitationKids Definition
ruler
noun
rul·er
ˈrü-lər 
2
: a straight strip of material (as wood or metal) marked off in units and used as a guide in drawing lines or for measuring
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