KCN Views 13 meanings found KCN most often denotes potassium cyanide, a highly toxic chemical, while in cultural circles it may refer to Korean Culture Night events. Medical Kamuzu College of Nursing Miscellaneous Keeyask Cree Nation Kentucky Child Now Community Korean Culture Night KDU Community Network Club de Networking Kingdom Community Network Academic & Science Potassium Cyanide Regional Chernofski, Alaska USA Computing Key Conversion Notice Business Kingsgate Consolidated Ltd Kenyon Career Network Kelly Career Network