A team that beats every other Six Nations team in rugby union wins the Grand Slam.
The achievement requires five victories in the modern Six Nations format, because each of the six participants plays every other team once. A Grand Slam therefore combines an unbeaten championship campaign with wins against all five opponents.
The term is distinct from the Triple Crown. The Triple Crown is available only to one of the four participating countries from the British Isles—England, Ireland, Scotland, or Wales—and requires victories over the other three. A team can win the Grand Slam without being eligible for the Triple Crown.
The Wooden Spoon is another separate informal distinction, generally associated with finishing last. It is not the same as failing to win a Grand Slam, and it is not an official championship title in the same sense.