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

     

    burr

     noun
    noun
    BrE BrE//bɜː(r)//
     
    ; NAmE NAmE//bɜːr//
     
    Plants
     
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  1. 1[usually singular] a strong pronunciation of the ‘r’ sound, typical of some accents in English; an accent with this type of pronunciation She speaks with a soft West Country burr.
  2. 2[usually singular] the soft regular noise made by parts of a machine moving quickly synonym whir
  3. 3 (also bur) [countable] the seed container of some plants which is covered in very small hooks that stick to clothes or fur See related entries: Plants
  4. Word Origin Middle English (in sense (3)): probably of Scandinavian origin and related to Danish burre ‘burr, burdock’, Swedish kard-borre ‘burdock’.
See the Oxford Advanced American Dictionary entry: burr