whitewash Definition

1. A mixture of lime and water, used to give a white coating to walls, especially outside walls.

Form: limewash (also)
2. Measures taken to cover up a disreputable affair or to clear a stained reputation, etc.

Thesaurus: cover-up, stonewall, red herring, camouflage, concealment, deception; excuse, rationalization, extenuation; Antonym: exposure.

1. To coat something with whitewash.

Form: limewash (also)
2. To clean up or conceal (eg a disreputable affair).

Thesaurus: cover up, stonewall, camouflage, conceal, gloss over, make light of, euphemize; Antonym: expose.
3. colloq
In a game: to beat (the opponent) so decisively that they fail to score at all.