noun: (basketball, US, informal) The four regional champions of the NCAA Division I tournament, one of whom will become the national champion.
noun: (basketball, US, informal) The final two rounds of the NCAA Division I tournament.
noun: (basketball, US, informal) An appearance in the Final Four..
noun: (basketball, Europe) The final round of the continent-wide Euroleague club basketball competition, featuring four teams with one becoming champion.
noun: (sports, Philippines, informal) The semifinal round, or an appearance in it generally.
