Definition of document:
an original or official paper relied upon as the basis, proof, or support of anything else, including any writing, book, or other instrument conveying information pertinent to such proof or support. Any material substance on which the thoughts of men are represented by any species of conventional mark or symbol; that which is taught or authoritatively set forth; precept; instruction; dogma
in documents; to furnish with documents or papers necessary to establish facts or give information
"he documented each step of the process as he did it, which was good when the investigation occurred."