AC
えーしー
noun
air conditioning; alternating current
1.
air conditioning; air conditioner
Abbreviation for air conditioning or air conditioner, commonly used in casual contexts.
ACを入れてくれない？
Could you turn on the AC?
車のACが壊れた。
The car's air conditioning broke.
今日は暑いからACを強めにしよう。
It's hot today, so let's turn up the AC.
ACをつけっぱなしで寝たら風邪を引いた。
I caught a cold from sleeping with the AC on all night.
2.
alternating current
Electrical term for alternating current, as opposed to DC (direct current).
ACで動く機械です。
This is a machine that runs on AC power.
このアダプターはAC100Vに対応している。
This adapter supports 100V AC.
AC has two main meanings in Japanese:
SENSE 1 - AIR CONDITIONING:
- Often used interchangeably with エアコン
- 車のAC: car air conditioning
- ACを入れる/つける: to turn on the AC
- ACを切る: to turn off the AC
SENSE 2 - ALTERNATING CURRENT:
- AC電源: AC power supply
- AC{アダプター}: AC adapter
- 対義語: DC (直流)
In casual conversation, Sense 1 is more common. Technical contexts typically make Sense 2 clear from context.