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sleeve

noun [C] (COVER)
 
 
/sliːv/

Definition

UK (US jacket) a cover to protect something: Can you put the record back in its sleeve, please?Lids, covers and stoppers a tube-shaped covering to protect a part of a machineMachine parts
(Definition of sleeve noun (COVER) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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