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

     

    grog

     noun
    noun
    BrE BrE//ɡrɒɡ//
     
    ; NAmE NAmE//ɡrɑːɡ//
     
    [uncountable]
     
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  1. 1a strong alcoholic drink, originally rum, mixed with water
  2. 2(informal, Australian English, New Zealand English) any alcoholic drink, especially beer
  3. Word Origin mid 18th cent.: said to be from Old Grog, the reputed nickname of Admiral Vernon (1684–1757), who in 1740 first ordered diluted (instead of neat) rum to be served out to sailors.
See the Oxford Advanced American Dictionary entry: grog