Meaning

noun droplets of water vapor suspended in the air near the ground

noun an atmosphere in which visibility is reduced because of a cloud of some substance

noun confusion characterized by lack of clarity

originOrigin uncertain; but probably of North Germanic origin. Probably either a back-formation from foggy (“covered with tall grass; thick, marshy”), from the earlier-attested fog (“tall grass”) (see below), or from or related to Danish fog (“spray, shower, drift, storm”), related to Icelandic fok (“spray, any light thing tossed by the wind, snowdrift”), Icelandic fjúka (“to blow, drive”), from…

Etymology from Wiktionary, CC BY-SA 3.0