A Binder

1. Someone who binds
   1. Someone who binds books, bookbinder.
2. A cover or holder for unbound papers, pages etc.
3. Something that is used to bind things together, often referring to the mechanism that accomplishes this for a book.
4. (programming) A software mechanism that performs binding.
5. A dossier.
6. (agriculture) A machine used in harvesting that ties cut stalks of grain into a bundle.
7. (chemistry) A chemical or other substance that causes two other substances to form into one.
8. (law) A down payment on a piece of real property that secures the payor the right to purchase the property from the payee upon an agreement of terms.
9. (chiefly Minnesota) A rubber band.
10. Material or clothing used in binding or flattening the breasts.
11. (molecular biology) protein binder

Synonyms

• (chemical etc.) binding agent