binder
//ˈbaɪndər//
Noun
binderSingular
bindersPlural
1
A cover or folder with rings or clips used to hold loose sheets of paper together.
I keep all my notes organized in a binder.
2
A person or machine that binds things, especially books.
The binder carefully restored the antique book.
3
A substance used to make other materials stick together.
Egg is often used as a binder in meatballs.
4
A tight-fitting undergarment worn to flatten the chest.
They wore a binder under their shirt to flatten their chest.