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Air Conditioner (Noun)

A system that keeps air cool and dry.

Nouns denoting man-made objects.

The new air conditioner was installed in the bedroom window to provide relief from the summer heat.
After the power outage, the air conditioner would not turn on, and the room quickly became hot and humid.
The office building was equipped with a state-of-the-art air conditioner that maintained a consistent temperature of 72 degrees Fahrenheit.
The portable air conditioner was moved from room to room to cool different areas of the house as needed.
During the renovation, the old air conditioner was replaced with a new energy-efficient model that reduced energy costs significantly.

An appliance designed to extract humidity from the air and thereby cool it; "we rarely turn on the air-conditioner".

Nouns denoting man-made objects.

We installed an air conditioner in the bedroom window last summer to stay cool.
I set the thermostat on the air conditioner to sixty-five degrees before going to bed.
On a sweltering summer day like today, I appreciate having a functioning air conditioner at work.
Air conditioners not only lower the temperature, but they also dehumidify the air and improve indoor air quality.
To conserve energy, my roommate turns off the air conditioner when no one is in the house.