binder
bind|er /b'aɪndər/ (binders)
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A binder is a hard cover with metal rings inside, which is used to hold loose pieces of paper.ring bind|er (ring binders)
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A ring binder is a file with hard covers, which you can insert pages into. The pages are held in by metal rings on a bar attached to the inside of the file.
[N-COUNT]
A binder is a hard cover with metal rings inside, which is used to hold loose pieces of paper.ring bind|er (ring binders)
[N-COUNT]
A ring binder is a file with hard covers, which you can insert pages into. The pages are held in by metal rings on a bar attached to the inside of the file.