1. (especially BrE) (in the past) a period of time during a war when the streets and buildings were kept as dark as possible so that the enemy could not see what to bomb（战时）灯火管制2. [usually plural] (BrE) a covering for windows that stops light from outside coming in, or that stops bright light being seen from outside遮光窗帘◆blackout material 窗户遮光材料3. ( ˈoutageNAmE) a period of time when the electricity supply to a place stops completely断电；停电4.a situation when the government or the police prevent a radio or television programme from being broadcast, or do not allow some news or information to be given to the public（广播或电视节目的）禁播；（对新闻或信息的）封锁◆The government have been accused of maintaining a news blackout over election fraud. 政府被指封锁有关选举舞弊的新闻报道。