AK noun3 •an AK-47, AK-74, or related assault rifle (Avtomat Kalasnikova or Kalashnikov) •(slang, nonstandard) Any assault rifle or machine gun.Cops got AKs, y'all only got pumps, that shit's just dumb. — 2001 •Abbreviation of Alaska: a state of the United States. formsAKs