- 1Grand Slam a very important sports event, contest, etc. a Grand Slam tournament/cup/title
- 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(also grand slam home run) (in baseball) a home run that is worth four points
- 4(in card games, especially bridge) the winning of all the tricks in a single game
Check pronunciation: grand slam