Catholicism (noun)

1. A Christian religious tradition and one of the largest denominations within Christianity, characterized by a hierarchical structure, the papacy, and the veneration of saints.
2. The beliefs, practices, and traditions of Catholicism as a religion.

Origin:

From the greek word "katholikos" meaning "universal".

Examples:

1. The cathedral was the center of Catholicism in the city.
2. Catholicism is the largest Christian denomination in the world.
3. The Vatican is the headquarters of Catholicism.
4. The priest provided a lesson on the basics of Catholicism.
5. The tradition of Catholicism has a rich history dating back thousands of years.