1. a folder or cover for holding loose papers together
2. a substance that holds other materials together
3. a machine that binds grain into bundles
Usage: agricultural

Examples

• She organized her class notes in a three-ring binder.
• The student bought a new binder for each subject.
• Cement acts as a binder in concrete mixtures.
• The farmer used a binder to harvest the wheat.
• They signed a binder to secure the house purchase.
• Her binder was filled with important documents.
• The paint needs a binder to adhere properly to the surface.