fog n
1. droplets of water vapor suspended in the air near the ground
2. an atmosphere in which visibility is reduced because of a cloud of some substance [syn: fogginess, murk, murkiness]
3. confusion characterized by lack of clarity [syn: daze, haze] v : make less visible or unclear; "The stars are obscured by the clouds" [syn: obscure, befog, becloud, obnubilate, haze over, cloud, mist] [also: fogging, fogged]

Fog \Fog\, n. (Photog.) Cloudiness or partial opacity of those parts of a developed film or a photograph which should be clear.

Fog \Fog\, v. t. (Photog.) To render semiopaque or cloudy, as a negative film, by exposure to stray light, too long an exposure to the developer, etc.

Fog is mist when it is very thick. It may appear on land or sea. It usually lowers visibility (makes it hard to see very far). When fog forms at high levels it creates a cloud called stratus. When the air chills, moisture will turn to fog.

Fog is made up of tiny water droplets or, in very cold conditions, ice crystals. When seen on a high speed camera, (a special camera that takes many frames and can view videos at very low speed) it looks like hundreds of small water droplets moving through the air. These water droplets make up the fog or mist. There are many types of fog, such as evaporation fog, advection fog, radiation fog, and upslope fog. The thickness of fog varies depending on the atmosphere, temperature, weather and location.

Crepuscular rays made by tree shadows over fog

• Temperatures drop as morning fog shrouds Chicago skyline
  A thick fog that developed on Lake Michigan overnight spread to Chicago Tuesday morning, obscuring the city’s iconic skyline in a mist. While the fog is expected to burn off in the late morning, the cold front that produced it is expected to drop temperatures across the region after several days of temperatures in the 80s, according to the National Weather Servi Read more on this news related to 'Fog'
• Weather cools as fog blankets Chicago skyline Tuesday
  A thick fog that developed on Lake Michigan overnight spread to Chicago Tuesday morning, obscuring the city's iconic skyline in a mist. Read more on this news related to 'Fog'
• Fog at Wrigley, U.S. Cellular creates eerie scene
  Fog is an interesting phenomenon. A collection of water droplets suspended near the ground, the weather condition is comparable to a low-lying stratus cloud. The spooky sight caused quite a scene at not one but two Major League ballparks Monday … Continue reading → Read more on this news related to 'Fog'