out·age

[ou-tij]
noun
1.
an interruption or failure in the supply of power, especially electricity.
2.
the period during which power is lost: a two-hour outage on the East Coast.
3.
a stoppage in the functioning of a machine or mechanism due to a failure in the supply of power or electricity.
4.
the quantity of goods lost or lacking from a shipment. Compare innage ( def 1 ).
5.
Aeronautics. the amount of fuel used during a flight. Compare innage ( def 2 ).

Origin:
1900–05, Americanism; out + -age

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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00:10
Outage is always a great word to know.
So is tensile strain. Does it mean:
maximum deviation of an alternating current from its average value
fractional change in body's length due to applied tensile force
Collins
World English Dictionary
outage (ˈaʊtɪdʒ) [Click for IPA pronunciation guide]
 
n
1.  a quantity of goods missing or lost after storage or shipment
2.  a period of power failure, machine stoppage, etc

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

outage
"period or condition in which electrical power is disconnected," 1903, Amer.Eng.; formed on model of shortage (see short).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
It was the first major outage the service has suffered in months and possibly
  the first ever due to sabotage.
It seems really safe to keep three levels of security in the event of a power
  outage on the grid, as explained.
What you should do if there is a warning of an outage.
Had a smart grid been in place, it might have helped isolate the outage and
  prevent it from spreading.
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