Douglas Harper's Etymology Dictionary
Wiktionary
white-out
n. (alternative spelling of whiteout English)
WordNet
white-out
v. cover up with white-out; "white-out the typo"
lose daylight visibility in heavy fog, snow, or rain
widen the interlinear spacing by inserting leads
Usage examples of "white-out".
One through Nine, came in fragmentarily before the curtain of noise became an opaque white-out.
Even though I remember Matt Lauer, Al Gore, Michael Jordan, Batman, Web sites, Turkey Hills, cineplexes, Solo cups, Nintendo, White-Out, CD-ROM, heroin chic and guns, I don't know where they all went.
If I'm right about her, then there ought to be blanks on the tape corresponding with the white-outs surrounding the terrorist incidents.