religion
re·li·gion | \ ri-ˈli-jən
\
Definition of religion
1a The state of a religiousa nun in her 20th year of religion
1b(1) The service and worship of God or the supernatural
1b(2)Commitment or devotion to religious faith or observance
2 A personal set or institutionalized system of religious attitudes, beliefs, and practices
4 A cause, principle, or system of beliefs held to with ardor and faith
Source: 
The Loud Cry 