overspread or covered with clouds; cloudy

an overcast day.

Meteorology . (of the sky) more than 95 percent covered by clouds.

dark; gloomy.

Sewing . sewn by overcasting.

to overcloud, darken, or make gloomy

Ominous clouds began to overcast the sky.

to sew with stitches passing successively over an edge, esp. long stitches set at intervals to prevent raveling.

to become cloudy or dark

By noon it had begun to overcast.

Meteorology . the condition of the sky when more than 95 percent covered by clouds.

Mining . a crossing of two passages, as airways, dug at the same level, in which one rises to pass over the other without opening into it. Compare undercast ( def. 1 ) .

adjective

bright , clear , sunny

adjective

clouded , clouded over , dark , dismal , dreary , dull , gray , hazy , leaden , lowering , murky , nebulous , not clear , not fair , oppressive , somber , sunless , threatening , cloudy , darken , foggy , gloomy , heavy , obscure , sullen

verb

becloud , bedim , befog , blear , blur , cloud , dim , dull , eclipse , fog , gloom , mist , obfuscate , overshadow , shadow