Definition of belief
1
: a state or habit of mind in which trust or confidence is placed in some person or thing
her belief in God a belief in democracy I bought the table in the belief that it was an antique. contrary to popular belief
2
: something that is accepted, considered to be true, or held as an opinion : something believed
an individual's religious or political beliefs
especially
: a tenet or body of tenets held by a group
the beliefs of the Catholic Church
3
: conviction of the truth of some statement or the reality of some being or phenomenon especially when based on examination of evidence
belief in the validity of scientific statements
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Merriam-Webster unabridged
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Time Traveler for belief
The first known use of belief was in the 12th century
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