I. sand ‧ pa ‧ per 1 /ˈsændˌpeɪpə $ -ər/ BrE AmE noun [uncountable]
strong paper covered on one side with sand or a similar substance, used for rubbing wood in order to make the surface smooth
II. sandpaper 2 BrE AmE verb [transitive]
to rub something with sandpaper