"Saint" (abbreviated "St." and "St") To be canonized a saint, one (more) miracle is necessary. Canonization is a statement by the church that the person certainly enjoys the Beatific Vision. The saint is assigned a feast day which may be celebrated anywhere within the Catholic Church, although it may or may not appear on the general calendar or local calendars as an obligatory feast, parish churches may be built in his or her honor, and the faithful may freely and without restriction celebrate and honor the saint.

In the case of persons that common usage has called saints from "time immemorial" (in practice, since before 1500 or so), the Church may carry out a "confirmation of cultus", which is much simpler. For example, Saint Hermann Joseph had his veneration confirmed by Pope John Paul II.

In the case of the Eastern Catholic Churches, individual churches sui juris retain, in theory, the right to glorify (see next section on Eastern Orthodox practice) saints for their own jurisdictions, though this has rarely happened in practice.

Although a recognition of sainthood by the pope does not directly concern a fact of divine revelation, it must still be "definitively held" by the faithful as infallible under (at the very least) the Universal Magisterium of the Church since it is a truth connected to revelation by historical necessity. -- Canonization - Wikipedia Article