Definition of glasspaper noun from the Oxford Advanced Learner's Dictionary

 

glasspaper

 noun
noun
BrE BrE//ˈɡlɑːspeɪpə(r)//
 
; NAmE NAmE//ˈɡlæspeɪpər//
 
[uncountable](British English)
 
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thick paper with a covering of glass powder to make it rough, which is rubbed against things in order to make them smooth