noun, adjective
noun (plural documentaries) a film or a radio or television programme giving facts about sth:
a television documentary about / on the future of nuclear power
adjective [onlybeforenoun]
1 consisting of documents:
documentary evidence / sources / material
2 giving a record or report of the facts about sth, especially by using pictures, recordings, etc. of people involved:
a documentary account of the Vietnam war * The film was given a documentary style by the director.
