Whitewash Meaning

Example : A lime and water mixture for painting walls and fences bright white.1952, L. F. Salzman, Building in England, page 157:  For walls plaster gave a smooth white surface; or if it was not sufficiently white, or had become discoloured, it could be brightened up with a coat of whitewash or paint.2010, Andrew Miller, Cricinfo:  For the first time in a long time, Australia are being threatened with the prospect of a 5-0 whitewash  (Can we find and add a quotation of Addison to this entry?)