Definition of thorn noun from the Oxford Advanced American Dictionary

     

    thorn

     noun
    noun
    NAmE//θɔrn//
     
     
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  1. 1a small, sharp, pointed part on the stem of some plants, such as roses
  2. 2a tree or bush that has thorns see also blackthorn, hawthorn
  3. 3 (phonetics) the letter that was used in Old English and Icelandic to represent the sounds/θ/ and/ð/ and later written as th
  4. Idioms
    a thorn in somebody's side
     
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    a person or thing that repeatedly annoys someone or stops them from doing something
See the Oxford Advanced Learner's Dictionary entry: thorn

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