[fog] n [prob. of Scand origin; akin to Dan fog spray, shower] (1544) 1 a: vapor condensed to fine particles of water suspended in the lower atmosphere that differs from cloud only in being near the ground b: a fine spray or a foam for fire fighting
2: a murky condition of the atmosphere or a substance causing it 3 a: a state of confusion or bewilderment b: something that confuses or obscures "hid behind a ~ of rhetoric"
4: cloudiness or partial opacity in a developed photographic image caused by chemical action or stray radiation -- fog.less adj
fog vb fogged ; fog.ging vt (1599) 1: to cover, envelop, or suffuse with or as if with fog "~ the barns with pesticide"
2: to make obscure or confusing "accusations which fogged the real issues"
3: to make confused
4: to produce fog on (as a photographic film) during development ~ vi 1: to become covered or thick with fog
2. a: to become blurred by a covering of fog or mist b: to become indistinct through exposure to light or radiation