fog ‧ gy /ˈfɒɡi $ ˈfɑːɡi, ˈfɒːɡi/ BrE AmE adjective
1 . if the weather is foggy, there is fog:
a foggy day in November
driving in foggy conditions
2 . not have the foggiest (idea) spoken to not know at all:
None of us had the foggiest idea about how to put the tent up.
3 . if your mind is foggy, you cannot think or remember things clearly
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THESAURUS
▪ cloudy with a lot of clouds:
The weather was cold and cloudy.
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cloudy skies
▪ grey ( also gray American English ) grey in colour, because there are dark clouds – used especially in written descriptions:
Mary looked out at the cold grey sky.
▪ overcast dark and completely covered with clouds:
a chilly overcast day
▪ leaden literary a leaden sky is grey and full of dark clouds:
Snow fell from a leaden sky.
▪ gloomy dark and cloudy, in a depressing way:
The gloomy weather shows no sign of improving.
▪ foggy with thick low cloud that is difficult to see through. You use foggy especially about low-lying places:
a foggy day in London in November
▪ misty with light low cloud that is difficult to see through. You use misty especially about places that are next to water or in the mountains:
a cold misty morning
▪ hazy with air that looks cloudy, because there is smoke, dust, or mist in it:
hazy sunshine