sandpaper Syllabification: (sand·pa·per)Pronunciation: /ˈsan(d)ˌpāpər/Translate sandpaper | into French | into German | into Italian | into Spanish Definition of sandpaper noun paper with sand or another abrasive stuck to it, used for smoothing or polishing woodwork or other surfaces. used to refer to something that feels rough or has a very rough surface. verb [with object] smooth with sandpaper. Derivatives sandpapery adjective sandpaper in other Oxford dictionaries Definition of sandpaper in the British & World English dictionary