Main Entry:

white·out

Pronunciation:

\ˈhwīt-ˌau̇t, ˈwīt-\

Function:

noun

Etymology:

white + blackout

Date:

1942

: a surface weather condition in a snow-covered area (as a polar region) in which no object casts a shadow, the horizon cannot be seen, and only dark objects are discernible ; also : a blizzard that severely reduces visibility