Stationery refers to commercially manufactured writing materials, including cut paper, envelopes, writing implements, continuous form paper, and other office supplies. It encompasses materials that can be written on by hand, such as letter paper, or by equipment such as computer printers. Stationery also includes items like business cards, letterheads, invoices, receipts, hole punches, staplers, tapes, and tape dispensers. In addition to paper, stationery can also include pens, pencils, notebooks, journals, and notelets. The word "stationery" comes from the older noun "stationer," which used to refer to a person or store that sells stationery, books, and papers. It was also another word for bookseller and publisher in the past.

In summary, stationery encompasses a wide range of writing materials and office supplies, including paper, envelopes, writing implements, and other related items.