grand slam champion

noun

1. A person or team that has won a Grand Slam sporting event, especially one of the major tennis tournaments.

   B1

   countable

   • "She became a grand slam champion at the age of twenty."B1
   • "The young player defeated a former grand slam champion in the final."B2

2. In tennis, a player who has won all four major tournaments—the Australian Open, French Open, Wimbledon, and US Open—at least once.

   B2

   countable

   • "Only a few players have become grand slam champions in their careers."B2
   • "Winning all four major titles made her one of the sport's most celebrated grand slam champions."C1

3. A person who has won all four major championships in a particular sport within a single calendar year.

   B2

   countableformal

   • "In 1968, Rod Laver became the first tennis player to achieve the grand slam."B2
   • "Bobby Jones was the first golfer to win the grand slam in 1930."B2