sharp ‧ en ‧ er /ˈʃɑːpənə, ˈʃɑːpnə $ ˈʃɑːrpənər, ˈʃɑːrpnər/ BrE AmE noun [countable]
[ Word Family: noun : ↑ sharpener , ↑ sharpness , ↑ sharp ; adverb : ↑ sharp , ↑ sharply , ↑ sharpish ; verb : ↑ sharpen ; adjective : ↑ sharp ]
a tool or machine for sharpening pencils, knives etc