noun — [ mass noun] 1.
[Telecommunications] the misidentification of a signal frequency, introducing distortion or error.
• high-frequency sounds are prone to aliasing.
[Computing] the use of aliases to designate files, commands, addresses, or other items.
[Computing] the distortion of a reproduced image so that curved or inclined lines appear inappropriately jagged, caused by the mapping of a number of points to the same pixel.