ruler
rul‧er /ˈruːlə $ -ər/
noun [countable]
2.
a long flat straight piece of plastic, metal, or wood that you use for measuring things or drawing straight lines:
a 12-inch ruler
rul‧er /ˈruːlə $ -ər/
noun [countable] Word Family: noun: rule, ruler, ruling, unruliness; adjective: ruling, unruly, ruled; verb: rule, overrule
1. someone such as a king or queen who has official power over a country or area2.
a long flat straight piece of plastic, metal, or wood that you use for measuring things or drawing straight lines: