An example of smog is a low-lying yellow or brown layer of air.
- Archaic a noxious mixture of fog and smoke
- a low-lying, perceptible layer of polluted air
Origin of smogsm(oke) + (f)og
- Fog that has become mixed and polluted with smoke.
- A form of air pollution produced by the photochemical reaction of sunlight with hydrocarbons and nitrogen oxides that have been released into the atmosphere, especially by automotive emissions.
Origin of smogsm(oke) (f)og 1
(third-person singular simple present smogs, present participle smogging, simple past and past participle smogged)
- (informal) To get a smog check; to check a vehicle or have it checked for emissions.
- If the car is more than five years old, you'll have to have it smogged before you can register it.