Definition of air filter Air filter

We found 2 definitions of air filter from 2 different sources.

What does air filter mean?

Noun
air filter - a filter that removes dust from the air that passes through it
		air cleaner
		filter device that removes something from whatever passes through it
		ventilator a device (such as a fan) that introduces fresh air or expels foul air

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air filter (Noun)
A filter for removing dust and other particles from a stream of air, typically used in the air intake of an internal combustion engine , the output of an air compressor , the supply duct of a forced-air furnace, etc.