fog

Universal Words noun, verb noun [U,C] 1 a thick cloud of very small drops of water in the air close to the land or sea, that is very difficult to see through: Dense / thick fog is affecting roads in the north and visibility is poor. * freezing fog * Patches of fog will clear by mid-morning. * We get heavy fogs on this coast in winter. * The town was covered in a thick blanket of fog. compareMIST 2 a state of confusion, in which things are not clear: He went through the day with his mind in a fog. verb (-gg-) 1 [V, VN] ~ (sth) (up) if a glass surface fogs or is fogged up, it becomes covered in steam or small drops of water so that you cannot see through 2 [VN] to make sb/sth confused or less clear: I tried to clear the confusion that was fogging my brain. * The government was trying to fog the real issues before the election.