The Open Dictionary

ring binder

noun

UK/ˈrɪŋ ˌbaɪn.dəʳ/
US/ˈrɪŋ ˌbaɪn.dɚ/

Definitions of ring binder noun

  1. Countable

    A rigid, foldable cardboard folder equipped with internal metal rings designed to secure and organize loose-leaf papers.

    • She keeps all her important documents in a sturdy ring binder.

    • Students are required to purchase a ring binder for their coursework.

    • This ring binder comes with dividers to help organize documents.