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

     

    granddaddy

     noun
    (also grandaddy)noun
    BrE BrE//ˈɡrændædi//
     
    ; NAmE NAmE//ˈɡrændædi//
     
    (pl. granddaddies)(North American English, informal)
     
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  1. 1= grandfather
  2. 2the granddaddy the first or greatest example of something James Brown, the granddaddy of soul music
See the Oxford Advanced American Dictionary entry: granddaddy