(written as black out)a period during which no news stories may be reported, imposed by a government or other organisation
(written as black out)to exclude all light from an area
(written as black out)to stop news or information about a particular subject being made public
(written as black out)to lose radio contact, e.g. with a vessel or aircraft
(written as black out)to be unable to broadcast radio or television programmes, usually because of a strike
(written as black out)to have sudden loss of consciousness
- Originally a theatrical term, dating from the early 1920s, meaning toextinguish the lighting to darken the whole stage. It is now largelyassociated with its World War II use, when it was obligatory to cover allwindows, etc., before dark so that no gleam of light could be seen fromoutside.