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

     

    bob

     noun
    noun
    BrE BrE//bɒb//
     
    ; NAmE NAmE//bɑːb//
     
    Describing hair
     
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  1. 1a quick movement down and up of your head and body a bob of the head
  2. 2a style of a woman’s hair in which it is cut the same length all the way around She wears her hair in a bob. See related entries: Describing hair
  3. 3 (pl. bob) (informal) an old British coin, the shilling, worth 12 old pence That'll cost a few bob (= a lot of money).
  4. 4= bobsleigh
  5. Word Originnoun sense 1 late Middle English: of unknown origin. noun sense 2 and noun sense 4 late Middle English (denoting a bunch or cluster): of unknown origin. noun sense 3 late 18th cent.: of unknown origin.Idioms (British English, informal) small objects or items of various kinds She stuffed all her bits and pieces into a bag and left.
See the Oxford Advanced American Dictionary entry: bob