Definition of tipster noun from the Oxford Advanced American Dictionary

     

    tipster

     noun
    noun
    NAmE//ˈtɪpstər//
     
     
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  1. 1a person who tells you, often in exchange for money, which horse is likely to win a race, so that you can bet on it and win money
  2. 2 a person who gives information to the police about a crime or criminal
See the Oxford Advanced Learner's Dictionary entry: tipster