What is the meaning of Whitewashed?

simple past and past participle of whitewash

Of or pertaining to a fence or wall that has been painted with the temporary paint whitewash.

Having had any controversy or potential for scandal removed, ignored or downplayed.

Having been subjected to racial whitewashing: made to be or seem more white (Caucasian); for example, having been made to appear whiter via makeup, or by being illustrated in pictures or portrayed in films as white (despite originally or properly being nonwhite).

Source: wiktionary.org