binder
noun /ˈbaɪndə(r)/
  /ˈbaɪndər/
- [countable] a hard cover for holding sheets of paper, magazines, etc. together- a ring binder
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- [countable] a person or machine that puts covers on books                                     
- [countable, uncountable] a substance that makes things stick or mix together in a solid form
- [countable] a machine that fastens wheat into bunches after it has been cut