The definition of an airshed is a part of the geography that shares a common flow of air and that is exposed to the same things.
The air around a power plant that is exposed to the same level of pollutants and that has common characteristics is an example of an airshed.
- a region sharing a common flow of air, which may become uniformly polluted and stagnant
- the air of this region
Origin of airshedair + (water)shed
- Alternative spelling of air shed.