binder >> /ˈbaɪndər/
Definition: [noun] A cover for holding loose sheets of paper, magazines, etc., together.
Example: What covers my binders, folders, notebooks, and textbooks?
Definition: [noun] A substance that acts cohesively.
Example: Whereas the aggregate is the filler, the combination of water and cement provide the binder that keeps the material together.
Definition: [noun] A reaping machine that binds grain into sheaves.
Example: Others operated the plows, seed drills, binders, and other implements hitched behind the engines and tractors.
Definition: [noun] A bookbinder.
Example: Upon landing in Europe, Greer said, he found a binder to assemble the book.