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Elementary Dictionary
       

air conditioning

 
pronunciation:
eIr kn dI sh nIng
part of speech: noun
definition: When you have air conditioning in your house, it means that you have a system that cools the air inside your house.
My mom says they didn't have air conditioning in their house when she was a kid. She says it was very hot sometimes in the summer, but they just kept the windows open at night.
derivation: air-conditioned (adj.)