Source : WordNet®

glitch
     n : a fault or defect in a system or machine [syn: {bug}]

Source : Free On-Line Dictionary of Computing

glitch
     
        /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 {heisenbug}s).
     
        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}]