From Longman Dictionary of Contemporary Englishrazor-sharpˌrazor-ˈsharp adjective 1 very sharp razor-sharp teeth► see thesaurus at sharp2 intelligent and able to think quickly He has a razor-sharp mind.
Examples from the Corpus
razor-sharp• His sword was a wicked weapon, three feet in length and razor-sharp.• The twist of pain was razor-sharp, but the words had acted like a cold shower.• But the other was swollen and half closed, with a Technicolor bruise below it right down to her razor-sharp cheekbone.• I loved the pointy beard and razor-sharp eyes, the pearl earring fixed in his left lobe.• a razor-sharp hunting knife• A razor-sharp line divided the quick from the newly grown.• He was known for his brilliance, for his razor-sharp mind and for being a wonderful preacher.• The bomb detonated with a sharp crack, sending tiny but razor-sharp pieces of metal into the backs of the gun crews.• She trembled at the razor-sharp sleet of misery: losing Lucy.• Over millions of years, some of the reptiles developed razor-sharp teeth. 