The term "All-Ireland" refers to competitions and events that involve teams from across the island of Ireland. The most notable of these is the All-Ireland Senior Football Championship, which is an annual tournament featuring the best Gaelic football teams from both Northern Ireland and the Republic of Ireland.
In addition to football, there is also the All-Ireland Senior Hurling Championship, which showcases the top hurling teams. Both championships are organized by the GAA (Gaelic Athletic Association) and culminate in finals held at Croke Park in Dublin, where the champions are crowned.