A rough preliminary model

• Lacking refinement
• Coarse, as stucco
• A coarse plaster for the surface of external walls

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Roughcast \Rough"cast`\, n. 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. --Shak.

Wiktionary Word definitions in Wiktionary
n. 1 A crude model. 2 A rough surface finish, as of a plaster or stucco wall. 3 A mixture of pebbles or similar material used to finish a plaster or concrete wall. vb. 1 To shape crudely; to form in its first rudiments, without correction or polish. 2 To ...

WordNet Word definitions in WordNet
n. a coarse plaster for the surface of external walls a rough preliminary model v. shape roughly apply roughcast to; "roughcast a wall" hew roughly, without finishing the surface; "rough-hew stone or timber" [syn: rough-hew ]

Wikipedia Word definitions in Wikipedia
Roughcast or pebbledash is a coarse plaster surface used on outside walls that consists of lime and sometimes cement mixed with sand , small gravel , and often pebbles or shells . The materials are mixed into a slurry and are then thrown at the working ...