simple past tense and past participle of document
"The researcher documented all the findings from her field trip last week."
In plain English: To document something means to write down facts about it so you can prove they are true later.
"The team documented every step of their experiment with detailed notes and photos."
furnished with or supported by documents
"the first documented case of shark attack in those waters"
established as genuine
"The authenticity of the rare artifact was confirmed after it was documented by three independent experts."