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A reduction or cutback in electric power, especially as a result of a shortage, a mechanical failure, or overuse by consumers.


1. (Electrical Engineering) 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. (Electrical Engineering) a temporary reduction in electrical power. Compare blackout3
3. (Computer Science) a temporary slowing down of the workings of the internet caused when too many users attempt to access it at the same time



any curtailment of electric power, esp. a voltage reduction to prevent a blackout.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.brownout - darkness resulting from the extinction of lights (as in a city invisible to enemy aircraft)brownout - darkness resulting from the extinction of lights (as in a city invisible to enemy aircraft)
aircraft - a vehicle that can fly
dark, darkness - absence of light or illumination
References in periodicals archive ?
By Moh I Sduddin/Manila In contrast to previous rotational brownout, power outages in Mindanao have worsened with daily brownout durations of eight to nine hours, particularly in Kidapawan City and North Cotabato province.
BAE Systems-UK has developed a system to help helicopter pilots see better in brownout conditions.
Can someone at Electricity and Water Authority please check our problem with the brownout in our area?
We're working to solve the brownout problem in an integrated, affordable, end-to-end system," say Reggie Brothers Sandblaster program manager at DARPA's strategic technology office.
Additionally, BCRA frequently creates a confusing pattern of alternating brownout periods, making it more difficult to run a coherent issue campaign.
As the launch commenced, rotor wash created a powdery sand brownout around the aircraft that obscured all ground references.
Helicopter brownout occurs when a pilot loses visual references due to dust or sand re-circulating during take-off or landing, which is a major problem in arid desert terrain.
The brownout took effect as contract negotiations continue with the United Firefighters of Los Angeles City.
In its 10th Annual Network Brownout Report released today, NAHJ found that out of an estimated 16,000 stories aired on the network evening newscasts in 2004, only 115 stories, or 0.
On 26 April a Marine Medium Helicopter Squadron 266 CH-46E Sea Knight was destroyed by a hard landing during a brownout in Afghanistan.
The COP8SCR9 is the higher-voltage brownout version, from 4.
Los Angeles firefighters begin a rolling brownout of service reductions today, part of an effort to cover a $39million budget shortfall, as officials look for other savings so service can be restored.