What is the meaning of Whitewashed?

simple past and past participle of whitewash

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).

A person of color perceived as having assimilated at the expense of their own racial or cultural identity.

Source: wiktionary.org