Definition of "air conditioner" []

• An apparatus for controlling, especially lowering, the temperature and humidity of an enclosed space. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Sandell quickly shut off his air conditioner to avoid sucking any noxious fumes into the cab."
• "With the air conditioner broken and the bright sunlight pouring in, it was swelteringly hot in the cab."
• "Too hot outside, now too cold inside—the air conditioner had been preset to subarctic temperatures."