: an error or distortion created in a digital image that usually appears as a jagged outline
We commonly observe aliasing on television. This occurs when there is an insufficient magnification produced by the lens of a TV camera focused on periodic structures such as the pattern of pinstripes in an announcer's shirt, bricks in the wall of a house, or seats in an empty stadium.—
Douglas B. Murphy, Fundamentals of Light Microscopy and Electronic Imaging, 2001
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Merriam-Webster unabridged
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