A declaration by the pope that a deceased person is raised to the full honors of the altar.
Generally, this is a man or woman who has already been beatified. Two miracles credited to the beatus (beata, feminine) as God’s approval to canonize.
Beatification allows veneration of the blessed, canonization requires it.
The canonization is usually celebrated by the pope at St. Peter’s Basilica and is usually followed soon afterward by a solemn triduum in another church in Rome or elsewhere.