Dear aspirant !

Hope you are doing great ! The definition of fog is easy to understand ,see ,The definition of a fog is a mist of water vapor that is low to the ground, a mist of another liquid, or a state of confusion or blurred vision . An example of a fog is the cool gray cloud that covers San Francisco. An example of a fog is the little cloud of insect spray over a corn field..

Also you can say that thick white cloud that forms close to the land or sea. Fog makes it difficult for us to see.

Hope you find it helpful !

Thanks