noun

• an AK-47, AK-74, or related assault rifle (Avtomat Kalasnikova or Kalashnikov)
• (by extension, slang, nonstandard) Any assault rifle or machine gun.
• A Sepik language spoken in Sandaun Province, Papua New Guinea.
• (US) Abbreviation of Alaska, A state of the United States. [A state of the United States, formerly a territory. Capital: Juneau. Postal code: AK, largest city: Anchorage.]