A binder is a kind of notebook meant to hold loose papers together. You might have a binder for each of the classes you're taking.

One type of binder has three metal rings that keep papers securely in place, and hard plastic covers to protect them from being bent or torn. You can also use the word binder when you're talking about a sticky or adhesive substance, or anything that binds two items together. The Old English root is bindere, "a person who binds," from bindan, "to tie up."

Definitions of binder

n something used to tie or bind

Type of:
any connection or unifying bond

n a machine that cuts grain and binds it in sheaves

reaper binder
Type of:
harvester, reaper
farm machine that gathers a food crop from the fields

n holds loose papers or magazines

Type of:
protection, protective cover, protective covering
a covering that is intend to protect from damage or injury

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

Type of:
adhesive, adhesive agent, adhesive material
a substance that unites or bonds surfaces together

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