Fog forms when there’s a lot of water vapor low to the ground. It’s often found in valleys and near large bodies of water.
The word "fog" is a noun:
The word "foggy" is an adjective. It can be used to describe the condition of fog outside, but it’s also used to describe condensation that forms on mirrors and on glass:
Sometimes "fog" is used as a verb:
* ventilation: movement of air; the removal of moisture from the inside to the outside.
Click here to go to the Word of the Day page.
This page was first published on February 4, 2012. It was updated on March 24, 2015.