used to indicate that a named person is also known or more familiar under another specified name

Eric Blair, alias George Orwell

a false or assumed identity

a spy operating under the alias Barsad

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

misidentify (a signal frequency), introducing distortion or error

fringes at higher spatial frequency are aliased by the sensor