If there is a power blackout, the electricity supply to a place is temporarily cut off. There was an electricity black-out in a large area in the north of the country. = power cut
a momentary loss of consciousness the failure of electric power for a general region darkness resulting from the extinction of lights (as in a city invisible to enemy aircraft) a suspension of radio or tv broadcasting
A blackout is a period of time during a war in which towns and buildings are made dark so that they cannot be seen by enemy planes. blackout curtains
A fadeout of radio and telemetry transmission between ground stations and vehicles traveling at high speeds in the atmosphere caused by signal attenuation in passing through ionized boundary-layer (plasma sheath) and shockwave regions generated by the vehicle
(1) An option by an advertiser not to air a network commercial in a particular market The released time can be sold locally to another advertiser or used as Program Service Announcement or (2) refers to nationally televised sporting event whereby the broadcast is pre-empted in the home team's market
A temporary loss of vision and/or consciousness when a person is subjected to high accelerations
If a blackout is imposed on a particular piece of news, journalists are prevented from broadcasting or publishing it. a media blackout imposed by the Imperial Palace Journalists said there was a virtual news blackout about the rally
A period of time during which participants are not allowed to make changes to their 401(k) balances This generally occurs during a conversion to a new recordkeeper or when significant changes are being made to the plan The blackout gives the providers time to test and validate the new platform and/or provisions
Blackout basically blocks all outside light and should not be confused with dim-out which allows a small amount of light to be transmitted Blackouts are a popular choice for bedrooms, children's rooms, TV rooms and studies, however for a room to be blacked out any light from around the edges of the blind would require also have to be obscured Blackout fabrics are rarely specified in conservatories as they significantly darken the attached rooms of the house