| Acronym | Definition |
|---|
| AK | Alaska (US postal abbreviation) |
| AK | Acknowledge |
| AK | Animal Kingdom (Disney World theme park) |
| AK | Auckland, New Zealand |
| AK | Alicia Keys (singer) |
| AK | Arbeitskreis (German: Working Party) |
| AK | Acknowledgment |
| AK | Actinic Keratosis |
| AK | Applied Kinesiology |
| AK | Above Knee (amputation) |
| AK | Any Key |
| AK | Andrei Kirilenko (basketball player) |
| AK | Atomic Kitten (band) |
| AK | Armia Krajowa (Home Army, the Polish Resistance, WWII) |
| AK | Arbeiterkammer (Austrian trade union) |
| AK | Aga Khan (title of leader of a sect within the Ismaili branch of Islam) |
| AK | Aamir Khan (Indian actor) |
| AK | Ass Kicking |
| AK | Adenylate Kinase |
| AK | Anthony Kiedis (member of Red Hot Chili Peppers) |
| AK | Alles Klar (German: All Right, Okay) |
| AK | Avtomat Kalashnikova (Soviet assault rifle) |
| AK | Azad Kashmir |
| AK | Ash Ketchum (Pokémon) |
| AK | Application Kit |
| AK | All Knowing |
| AK | Avada Kedavra (Harry Potter) |
| AK | Awesome Kids |
| AK | Andrew Kim |
| AK | Audio Karate (band) |
| AK | Authorization Key |
| AK | Alternate Key (database theory) |
| AK | Aviation Storekeeper |
| AK | Armeekorps (German Army corps) |
| AK | AutomatKarbin (Swedish assault rifle) |
| AK | Adaptation Kit |
| AK | Data Acknowledgment (ANSI) |
| AK | commercial cargo ship (US DoD ship designation) |
| AK | Anime Kingdom |
| AK | Aurora Knights (gaming clan) |
| AK | Knight of the Order of Australia (Obsolete) |
| AK | Automatic Keying |
| AK | Atari Karts (Atari Jaguar video game) |
| AK | Abu Khader Group (Amman, Jordan) |
| AK | Ascension Kit (NetHack) |
| AK | Ante Calendas (Latin: Before the Calends, epigraphy) |
| AK | Anatomic Kinesiology |
| AK | (USN Rating) Aviation Storekeeper |
| AK | Automatic/Assault Rifle/Carbine/Cannon (Swedish military) |