whitewash in WordNet English dictionary

1. cover up a misdemeanor, fault, or error
   "Let's not whitewash the crimes of Stalin"; "She tried to gloss over her mistakes"
   whitewash  gloss over  sleek over  hush up 
   
2. exonerate by means of a perfunctory investigation or through biased presentation of data
   whitewash 
   
3. cover with whitewash
   "whitewash walls"
   whitewash 
   

1. a specious or deceptive clearing that attempts to gloss over failings and defects
   whitewash 
   
2. wash consisting of lime and size in water; used for whitening walls and other surfaces
   whitewash 
   
3. a defeat in which the losing person or team fails to score
   whitewash