Word parts sharpen + -er Pronunciation IPA (key): /ˈʃɑː(r)pənə(r)/ Audio (UK)(file) Noun Singular sharpener Plural sharpeners (countable) A sharpener is a device for making things sharp. There was a pencil sharpener at the front of the classroom.Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads