Definition of rod noun from the Oxford Advanced Learner's Dictionary

     

    rod

     noun
    noun
    BrE BrE//rɒd//
     
    ; NAmE NAmE//rɑːd//
     
     
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  1. 1(often used in compounds) a long straight piece of wood, metal or glass see also lightning rod
  2. 2= fishing rod fishing with rod and line Wordfinderbait, bite, dragnet, fishing, fly, hook, line, net, rod, trawl
  3. 3(also the rod) (old-fashioned) a stick that is used for hitting people as a punishment There used to be a saying: ‘Spare the rod and spoil the child.’
  4. 4 (North American English, slang) a small gun
  5. Word Origin late Old English rodd ‘slender shoot growing on or cut from a tree’, also ‘straight stick or bundle of twigs used to inflict punishment’; probably related to Old Norse rudda ‘club’.Extra examples After the accident she had an operation to put strengthening rods in her legs. He heated the end of the iron rod. The concrete is reinforced with steel rods. a fishing rod a glass fibre rod 2 or 3 mm in diameter a lightening rodIdioms
    make a rod for your own back
     
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    to do something that will cause problems for you in the future
    a rod/stick to beat somebody with
     
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    a fact, an argument, etc. that is used in order to blame or punish somebody
    rule (somebody/something) with a rod of iron
     
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    to control a person or a group of people very severely
See the Oxford Advanced American Dictionary entry: rod