[glich] Slang.
a defect or malfunction in a machine or plan.
Computers. any error, malfunction, or problem. Compare bug1 ( def 5 ).
a brief or sudden interruption or surge in voltage in an electric circuit.
verb (used with object)
to cause a glitch in: an accident that glitched our plans.

1960–65; perhaps < Yiddish glitsh slippery area; compare glitshn, German glitschen to slip, slide Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
glitch (ɡlɪtʃ)
1.  a sudden instance of malfunctioning or irregularity in an electronic system
2.  a change in the rotation rate of a pulsar
[C20: of unknown origin]

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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Word Origin & History

1962, Amer.Eng., possibly from Yiddish glitsh "a slip," from glitshn "to slip," from Ger. glitschen, and related gleiten "to glide." Perhaps directly from Ger.; it began as technical jargon in the argot of electronic hardware engineers, popularized and given a broader meaning by U.S. space program.
Online Etymology Dictionary, © 2010 Douglas Harper
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Computing Dictionary

glitch definition

/glich/ [German "glitschen" to slip, via Yiddish "glitshen", to slide or skid] 1. (Electronics) When the inputs of a circuit change, and the outputs change to some random value for some very brief time before they settle down to the correct value. If another circuit inspects the output at just the wrong time, reading the random value, the results can be very wrong and very hard to debug (a glitch is one of many causes of electronic heisenbugs).
2. A sudden interruption in electric service, sanity, continuity, or program function. Sometimes recoverable. An interruption in electric service is specifically called a "power glitch" (or power hit), of grave concern because it usually crashes all the computers. See also gritch.
2. [Stanford] To scroll a display screen, especially several lines at a time. WAITS terminals used to do this in order to avoid continuous scrolling, which is distracting to the eye.
4. Obsolete. Same as magic cookie.
[Jargon File]
The Free On-line Dictionary of Computing, © Denis Howe 2010
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Example sentences
Service was nearly flawless, the only glitch being a busboy who failed to bring
  more butter when additional rolls were offered.
The glitch cascaded, preventing air traffic control computers nationwide from
The so-called glitch occurred five times for each student.
And it withstands subzero temperatures without a glitch.
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