Meaning of AC in English

AC

/ ˌeɪ ˈsiː; NAmE / abbreviation

1.

(also ac , a / c ) ( especially NAmE ) air conditioning

2.

alternating current (an electric current that changes direction at regular intervals many times a second)

—compare DC

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.