(~s)
1.
When there is ~, there are tiny drops of water in the air which form a thick cloud and make it difficult to see things.
The crash happened in thick ~...
These ocean ~s can last for days.
N-VAR
2.
A ~ is an unpleasant cloud of something such as smoke inside a building or room.
...a ~ of stale cigarette smoke.
N-SING: usu N of n
3.
You can use ~ to refer to a situation which stops people from being able to notice things, understand things, or think clearly.
The most basic facts about him are lost in a ~ of mythology...
Synchronizing these attacks may be difficult in the ~ of war...
His mind was in a ~ when he finally got up.
N-SING: oft in N, N of n