air conditioner

US /ˈer kənˌdɪʃ.ən.ər/
UK /ˈer kənˌdɪʃ.ən.ər/
"air conditioner" picture
1.

a machine that cools the air in a room or building

:
It's so hot, let's turn on the air conditioner.
The old air conditioner needs to be replaced.