blackout

(redirected from Black-Outs)
Also found in: Dictionary, Thesaurus, Medical, Financial.
Related to Black-Outs: fainting

blackout

1. a momentary loss of consciousness, vision, or memory
2. a temporary electrical power failure or cut
3. Electronics a temporary loss of sensitivity in a valve following a short strong pulse
4. a temporary loss of radio communications between a spacecraft and earth, esp on re-entry into the earth's atmosphere
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

blackout

[′blak‚au̇t]
(communications)
(electricity)
The shutting off of power in an electrical power transmission system, either deliberately or through failure of the system.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

blackout

blackoutclick for a larger image
The relationship between acceleration and time at maximum G required to produce symptoms of grayout and blackout.
i. A condition of temporary loss of vision, possibly also loss of consciousness, resulting from the effect of high and sustained positive acceleration (g) on the body. A condition that occurs at g value higher than 1 that causes gray-out. Normally, this occurs when the body is exposed to +4 and +4.5 g for about 10 seconds or more. This can be postponed slightly by using a g-suit, by crouching, or by using a reclining seat. The onset of gray-out and blackout conditions varies from individual to individual. It is also dependent on physical conditioning.
ii. The fadeout of radio communications caused by changes in the ionosphere resulting from a nuclear explosion or ionospheric disturbances.
iii. An enforced period during which all lights in an area are turned off or concealed, so as not to be visible from the air. It is one of the passive air defense measures.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved

blackout

A complete loss of power. See brownout.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
As the long hot summer progresses, the black-outs are bound to increase, making life harder and less productive.
He believes large-scale investment in high-voltage power lines is not the answer to the recent black-outs that deprived certain European countries of electricity.
He has been suffering from black-outs for more than a year but until last week, he did not know why.
Frequent power black-outs has been the norm for years.
Brian will also include the black-outs and the threat of Zeppelin air raids and the production of munitions, centred on the town's chemical industry.
The installation of a static var compensator (SVC) will provide reactive power support to mitigate voltage instabilities and help prevent black-outs. SVC is part of ABB's family of flexible alternating current transmission systems (FACTS) technologies, which improve the capacity, security and flexibility of power transmission systems, and makes a valuable contribution to the development of smarter grids.
The blast knocked out the island's biggest power plant at Vassiliko next to the base, causing black-outs in the capital Nicosia and at dozens of tourist resorts.
He said Valliday is due to see a neurologist about black-outs, and added: "There are a litany of gaps in the case."
She also navigated the number 14 from the garage to town, through the debris of bombed buildings, in the black-outs of the Blitz.
FBI men Joseph Fiennes and John Cho are still trying to work out why the worldwide black-outs happened and what all the visions meant.
This policy is unpopular and a vote loser because the public know that wind energy will lead us into power black-outs and costly energy, apart from the destruction of our countryside in a futile attempt to alter global climate change.