1. A difficulty or problem typically not of major significance: There are some glitches in the old computer software which are causing some problems.

Glitches in the speaker's schedule caused some delays in his arrival at the press conference.

2. A sudden unwanted electronic signal; such as, from a power surge or a temporary irregular over-supply of power: The neighborhood had a spike or a glitch with the voltage in their electrical current during the night as a result of the lightening storm.

It is possible that there is a glitch in the computer program which may cause the hardware to malfunction or there might be a glitch in the computer itself.

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To experience an occasional or unexpected malfunction of equipment: Madeline's computer keeps glitching and then after a few hours it just reboots without any warning.

Bill's computer glitched again last night and then it was normal again in the morning when he restarted it.

Tom's job includes troubleshooting when customers' computer systems glitch or don't function as they should.

An error or bad functioning; something that has gone wrong. (1)