A machine that cools, dehumidifies, and purifies the air in a room or building.
From the combination of the words "air" and "conditioner", referring to a device that conditions the air in a room or building.
- She turned on the air-conditioner to cool the room.
- The air-conditioner was not working, so the room was hot and stuffy.
- The air-conditioner was a welcome relief on a hot summer day.
- He had to replace the air-conditioner filter.
- The air-conditioner hummed softly in the background.