1. binder, reaper binder, harvester, reaper

usage: a machine that cuts grain and binds it in sheaves

2. binder, adhesive material, adhesive agent, adhesive

usage: something used to bind separate particles together or facilitate adhesion to a surface

3. binder, ring-binder, protective covering, protective cover, protection

usage: holds loose papers or magazines

4. binder, ligature, ligament

usage: something used to tie or bind

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