The definition of a condensing air is a type of air conditioning system that uses a condenser to convert hot air into cool air. This is done by using a refrigerant to absorb the heat from the air and then releasing it outside the building. The condenser then takes the heat from the refrigerant and releases it outside the building, thus cooling the air inside. This type of air conditioning system is more efficient than traditional air conditioning systems, as it uses less energy to cool the air. It is also more cost-effective, as it requires less maintenance and is less expensive to install. Additionally, condensing air conditioning systems are more environmentally friendly, as they produce fewer emissions than traditional air conditioning systems.