Definition of religion
1
: a personal set or institutionalized system of religious attitudes, beliefs, and practices
2a(1)
: the service and worship of God or the supernatural
(2)
: commitment or devotion to religious faith or observance
2b
: the state of a religious
a nun in her 20th year of religion
3
: a cause, principle, or system of beliefs held to with ardor and faith
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Merriam-Webster unabridged
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The first known use of religion was in the 13th century
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