noun, plural doc·u·men·ta·ries.
- document reader,
Origin of documentary
noun plural -ries
c.1810, "pertaining to documents," from document + -ary. Meaning "factual, meant to provide a record of something" is from 1926, from French film documentarie (1924). The noun (short for documentary film) is attested from 1935. Docudrama is a 1961 coinage.