Haze (noun)

1. A light cloud of fine particles suspended in the air, especially near the ground.
2. A condition of reduced visibility due to the presence of such particles in the air.

Origin:

Haze (n.) late 14c., from old english hæs "mist, haze,".

Examples:

1. The city was covered in a haze.
2. He was flying through the haze.
3. She was looking out at the haze on the horizon.
4. The sun was obscured by the haze.
5. The air was filled with a haze caused by pollution.