|1.||a dimming or reduction in the use of electric lights in a city, esp to conserve electric power or as a defensive precaution in wartime|
|2.||Compare blackout a temporary reduction in electrical power|
|3.||a temporary slowing down of the workings of the internet caused when too many users attempt to access it at the same time|
A situation in which the voltage in a power grid is reduced below its normal level but not entirely eliminated. (Compare blackout.)
Note: This reduced voltage can result in damage to many electronic devices.