Ruler
/rˈulər/
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Definition
(noun) A (usually rigid), flat, rectangular measuring or drawing device with graduations in units of measurement; a straightedge with markings.
Sentence Examples
Alfred, King of England, was a great scholar as well as a great ruler.
Measure the length of the stick with a ruler.
CEFR Practice Quiz
The student used a ____ to draw a straight line across the page of her notebook.