meaning of ruler
1. One who rules; one who exercises sway or authority; a governor.
2. A straight or curved strip of wood, metal, etc. , with a smooth edge, used for guiding a pen or pencil in drawing lines. Cf. Rule, n. , 7 (a).
3. measuring stick consisting of a strip of wood or metal or plastic with a straight edge that is used for drawing straight lines and measuring lengths
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