to form in its first rudiments, without revision, correction, or polish.-to mold without nicety or elegance; to form with asperities and inequalities.-to plaster with a mixture of lime and shells or pebbles; as, to roughcast a building.-a rude model; the rudimentary, unfinished form of a thing.-a kind of plastering made of lime, with a mixture of shells or pebbles, used for covering buildings.