As a noun, it is a written or printed paper, or a digital file, that provides information or proof. As a verb, it means to record details about something so there is a clear, lasting record.
From Latin 'documentum', meaning 'example, proof, lesson', from 'docēre' meaning 'to teach'. It came through Old French into Middle English. Over time, it shifted from meaning a lesson or example to the physical or written proof itself.
Every time you create a document, you're literally making something that is supposed to 'teach' or 'show' the truth—that's built into its Latin root. Even casual documents like text files and notes carry this idea of preserving knowledge. The word quietly reminds us that information becomes powerful when it is recorded.
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