AC
noun uk/ˌeɪˈsiː/ us/ˌeɪˈsiː/
(ELECTRICITY)
[ U ]交流电（alternating current的缩写）
abbreviation for alternating current: electrical current that regularly changes the direction in which it flows
Compare: DC (ELECTRICITY)
(AIR)
[ C or U ] US空调机，空调系统（air conditioner或air conditioning的缩写）
abbreviation for air conditioner or air conditioning