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English definition of “binder”

binder

noun [C]     /ˈbaɪn.dər/ US  /-dɚ/
a hard cover in which paper documents or magazines are stored: a leather/plastic binderBooks and parts of books a bookbinderCovering and adding layers
(Definition of binder noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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