B1
a film, television or radio program that gives facts and information about a subject
Dictionary examples:
The documentary 'How to Pretend You're Working' became required viewing at our company. (0.0)
The documentary on 'How to Nap at Work' was a big hit in our office. (0.0)
I watched a documentary about penguins who think they're secret agents. (0.0)
They showed a documentary on animal communication. (23.4)
The documentary took a fresh look at the life of Darwin. (24.7)