the documents that are required for sth, or that give evidence or proof of sth 必备资料；证明文件◆I couldn't enter the country because I didn't have all the necessary documentation. 我无法入境，因为我的证明文件不齐全。◆They have insufficient documentation to support their claims. 他们没有足够的证明材料以支持其主张。
the act of recording sth in a document; the state of being recorded in a document 文件记载；文件归档；文献记录◆the documentation of accounting decisions 会计决策的文件记录◆an electronic documentation system 电子文件归档系统
the documents that describe how sth works or how to operate it 文档；文件◆the technical documentation for a computer system 计算机系统的技术文档