I. adverb used to indicate that a named person is also known or more familiar under another specified name • Eric Blair, alias George Orwell.
II. noun 1. a false or assumed identity • a spy operating under the alias Barsad.
[Computing] an alternative name or label that refers to a file, command, address, or other item, and can be used to locate or access it.
[Telecommunications] each of a set of signal frequencies which, when sampled at a given uniform rate, would give the same set of sampled values, and thus might be incorrectly substituted for one another when reconstructing the original signal.
III. verb — [with obj.] 1.
[Telecommunications] misidentify (a signal frequency), introducing distortion or error.
• fringes at higher spatial frequency are aliased by the sensor.
– origin late Middle English: from Latin, ‘at another time, otherwise’.