fogfog1 /fɒɡ $ fɑːɡ, fɒːɡ/ ●●●S3W3 noun 🔊 🔊 1[countable, uncountable]DNcloudy air near the ground which is difficult to see through syn mistthick/dense/freezing fog 🔊 We got lost in the thick fog. 🔊 It will be a cold night, and there may be fog patches. 🔊 A blanket of fog covered the fields. 🔊 The fog lifted (=disappeared) in the afternoon.2[singular] informalCONFUSED a state in which you feel confused and cannot think clearly 🔊 My mind was in a fog.fog of 🔊 the fog of tirednessCOLLOCATIONSADJECTIVES/NOUN + fogthick/dense/heavy fog (=great in amount and difficult to see through)The two lorries collided in heavy fog.freezing fogFlights were cancelled due to freezing fog.swirling fog (=which blows around)She could not see through the swirling fog.patchy fog (=in some areas but not in others)Mist and patchy fog will form tonight.hill/sea/ground fogRain was forecast, along with hill fog.verbsbe covered in fogThe mountains were covered in fog.be shrouded in fog literaryThe streets of London were shrouded in fog.the fog comes down (also the fog descends literary) (=it appears)Day after day the fog came down.the fog rolls in (=it arrives from the mountains, the sea etc)The fog rolled in from the ocean.the fog lifts (=it disappears)He sat and waited for the fog to lift.phrasesa blanket of fog (=a large area of fog)A blanket of fog lay over the town.a bank of fog (also a fog bank) (=a large mass of fog)As we approached the coast, we ran into a dense bank of fog.patches of fog (=fog that forms in some places but not in others)Patches of fog are expected later today.
fogfog2 verb (fogged, fogging) 🔊 🔊 1[intransitive, transitive] (also fog up)D if something made of glass fogs or becomes fogged, it becomes covered in small drops of water that make it difficult to see through syn mist up, steam up 🔊 The windscreen had fogged up.2CLEAR/EASY TO UNDERSTAND[transitive] to make something less clear syn cloud→ See Verb table