A more thorough explanation:

Definition: Document is both a noun and a verb. A document is a written record of information. In the past, a document was usually a piece of paper with information on it, but now it can also be stored electronically. To document means to create a record of something.

Example 1: I need to document my expenses for the month by keeping receipts and writing them down in a notebook.

Example 2: The lawyer asked me to bring all the necessary documents to the meeting, including my ID and proof of address.

Example 3: The historian spent years documenting the history of the town by collecting old photographs and interviewing residents.

These examples illustrate how a document can be used to record information. In example 1, the person is creating a record of their expenses by documenting them in a notebook. In example 2, the lawyer needs certain documents to create a record of the person's identity and address. In example 3, the historian is creating a record of the town's history by collecting information from various sources.