Noun

1. Someone who binds, particularly someone who binds books; a 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. Adossier.
5. A machine used in harvesting that ties cut stalks of grain into a bundle.
6. A chemical that causes two other substances to form into one.
7. 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.
8. A rubber band.