1Air conditioning or cooling of a room; also refers to the system that provides it.
夏は冷房がないと過ごせない。
I can't get through summer without air conditioning.
冷房が効きすぎて少し寒い。
The air conditioning is too strong and it's a bit cold.
電車の中は冷房が強かった。
The air conditioning on the train was strong.
節電のため、冷房の温度を28度に設定した。
To save electricity, I set the air conditioner to 28 degrees.