Definition of breeding ground noun from the Oxford Advanced American Dictionary

     

    breeding ground

     noun
    noun
     
     
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  1. 1[usually plural] a place where wild animals go to produce their young Some birds fly south to find good breeding grounds.
  2. 2breeding ground (for something) [usually singular] a place where something, especially something bad, is able to develop This area of the city has become a breeding ground for violent crime.
See the Oxford Advanced Learner's Dictionary entry: breeding ground