ring-bound folder
nounUK /rɪŋ baʊnd ˈfəʊldə/
US /rɪŋ baʊnd ˈfoʊldər/
A folder with metal rings inside that hold papers together.
She put her worksheets into a ring-bound folder.
OTHER MEANINGS
2. A school supply used to keep notes organized by subject.
He keeps his science notes in a blue ring-bound folder.
3. A storage item with openable rings for adding or removing pages.
The ring-bound folder lets you add new pages anytime.
4. A type of office file that holds punched paper.
Please file these reports in the ring-bound folder on the shelf.