ruler     
  rul‧er /ˈruːlə $ -ər/ BrE  AmE  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 area   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
  r\\rulerhu 
  ruler A ruler is a straight piece of material that is used for measuring distances or drawing straight lines.| ◎ | ['ru:lə] |  | ※ | danh từ |  |   | ■ | người cai trị, người thống trị, người trị vì, người chuyên quyền (vua, chúa..) |  |   | ■ | cái thước kẻ |  |   | ■ | thợ kẻ giấy; máy kẻ giấy |  
 
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