Aak or AAK may refer to: Aak, a genre of Korean court music Aak flower, madar or crown flower, common name of Calotropis gigantea AAK Theory, a mathematical theory relating rational functions with singular values AarhusKarlshamn (operating as AAK), a Swedish producer of vegetable oils and fats Ajnad al-Kavkaz, a Chechen-led militia in the Syrian Civil War Alliance for the Future of Kosovo, an alliance of political parties in Kosovo Ankave language, a language of Papua New Guinea Aranuka Airport in Aranuka, Kiribati Architectural Association of Kenya Armée de l'Air Khmère (Khmer Air Force, the air force of the Khmer Republic) Automobile Association of Kenya