Definition of grand slam noun from the Oxford Advanced American Dictionary

     

    grand slam

     noun
    noun
     
     
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  1. 1Grand Slam a very important sports event, contest, etc. a Grand Slam tournament/cup/title
  2. 2the winning of every part of a sports contest or all the main contests in a year for a particular sport Will Serena Williams win the grand slam this year? (= in tennis )
  3. 3(also grand slam home run) (in baseball) a home run that is worth four points
  4. 4 (in card games, especially bridge) the winning of all the tricks in a single game
See the Oxford Advanced Learner's Dictionary entry: grand slam