MEK can stand for* In chemistry Methyl ethyl ketone The Iranian organisation Mujahideen-e Khalq Mek, a comic mini series by Warren Ellis In Hungary the Magyar Elektronikus Könyvtár, a digital library In cryptography Message Encryption Key The Mobiles Einsatzkommando, a special police unit in Germany The MAPK/ERK kinases(MAP2Ks) (biology) The Mek (tribe), an indigenous tribe of West Papua, Western New Guinea, Indonesia, featured in the Travel Channel reality series . The Mu Epsi… (More on Mek)