noun A thick cloud of tiny water droplets suspended in the atmosphere at or near the earth's surface which obscures or restricts visibility (to a greater extent than mist; strictly, reducing visibility to below 1 km) (the collision occurred in thick fog) Something that obscures and confuses a situation or someone's thought processes. (the origins of local government are lost in a fog of detail)
verb (with reference to a glass surface) cover or become covered with steam. (hot steam drifted about her, fogging up the window) Bewilder or puzzle (someone) (she stared at him, confusion fogging her brain) Treat with something, especially an insecticide, in the form of a spray. (Winnipeg stopped fogging for mosquitoes three years ago)
noun The grass which grows in a field after a crop of hay has been taken.