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Definition: 1. to update the contents of a window to show information that has changed; to REPAINT the screen. 2. to RELOAD the contents of a WEB PAGE from the machine on which it resides. 3. to regenerate the display on a CRT screen by scanning the screen with an electron beam. Though it seems to, the screen does not glow continuously; instead, it is refreshed 30 to 90 times per second, rather like a movie screen. 4. to freshen the contents of a memory chip. Dynamic RAM chips have to be refreshed many times per second; on each refresh cycle, they read their own contents and then store the same information back into the same memory location.
Source: Downing, Douglas, et al. Dictionary of Computer and Internet Terms. 10th ed. New York, 2009. Print.