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

     

    ringer

     noun
    noun
    BrE BrE//ˈrɪŋə(r)//
     
    ; NAmE NAmE//ˈrɪŋər//
     
    Equine sports
     
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  1. 1= bell-ringer
  2. 2(North American English) a horse or person that takes part in a race illegally, for example by using a false name See related entries: Equine sports
  3. Idioms
    be a dead ringer for somebody
     
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    (informal) to look very like somebody She's a dead ringer for a girl I used to know.
See the Oxford Advanced American Dictionary entry: ringer