A documentary is defined as a film or television program that is educational and tells a true story.
(noun)An example of a documentary is the An Inconvenient Truth, a movie about global warming.
The definition of documentary is a film or television program that shows a story or situation truthfully.
(adjective)An example of something documentary is evidence that proves someone's alibi during the time of a murder; documentary evidence.
See documentary in Webster's New World College Dictionary
adjective
noun pl. documentaries
See documentary in American Heritage Dictionary 4
adjective
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