Mimeo, a trademark name for a duplicating machine that produces copies of written or typed documents, has a few antonyms, including original, unique, one-of-a-kind, authentic, and non-reproducible. These antonyms emphasize the singular nature of a document that cannot be replicated precisely, unlike a mimeographed copy. An original or unique document carries the implication of being the first of its kind or distinct from any other. Authenticity emphasizes the genuine or original character of a document, while non-reproducible implies that the document is incapable of being duplicated. In a world dominated by digital technology, these antonyms for mimeo remind us of the unique value and importance of physical, one-of-a-kind documents.