To paint over with a lime and water mixture so as to brighten up a wall or fence.
The houses looked very bright when they whitewashed the whole neighborhood.
To cover over errors or bad actions.
In his sermon, the minister didn't try to whitewash over the sins of his church.
To repay the financial debts of (another person).
(late, 19th century) To prevent a team from scoring any runs.
In various games, to defeat (an opponent) so that they fail to score, or to reach a certain point in the game; to skunk.
To make over (a person or character, a group, an event, etc) so that it is or seems more white, for example by applying makeup to a person, or by covering over the participation of people of color in an event and focusing on only white participation.
The application of whitewash.
The effacement of errors or bad actions.
The revisionist portrayal of something as to over-favor the Caucasian/white populaces.