documentary noun
ADJ. dramatized | fly-on-the-wall | film, radio, television/TV | controversial | science, wildlife, etc. | half-hour, hour-long, forty-minute, etc.
VERB + DOCUMENTARY make She has made a television documentary on poverty in our cities. | film | show | see, watch
DOCUMENTARY + NOUN feature, film, programme, series
PREP. in a/the ~ There were some interesting interviews in the documentary. | ~ about/on a documentary about identical twins
You can also check other dicts: documentary (English, 中文解释 ), wordnet sense, Collins Definition