Definition of "alias"

alias

/ˈeɪ.li.əs/

adverb
not comparable
1. Otherwise; at another time; in other circumstances; otherwise called.
  Quotations
  Hitherto the commanding influence of Sir Robert Evelyn's character had sunk his own into insignificance—now he had no "rival near the throne," alias the bench of county magistrates.
  1834, L[etitia] E[lizabeth] L[andon], chapter XX, in Francesca Carrara. […], volume III, London: Richard Bentley, […], (successor to Henry Colburn), page 168
  When indeed a Popish monarch may fill our throne, and the successor of St. Peter shall be the spiritual head of our Church; then shall your “esoterics,” alias “Church principles,” be in the ascendant in our Universities, and Who shall say that we may not have a Thorp lecturer in each of our Colleges, Neale and Webb scholarships, Regii professores supplying the places of those who shall now be superannuated, all teaching, and empowered to confer degrees in the, symbolism of mystical divinity:—the professor of music, not dealing as he now must, with crotchets and quavers, but in the far higher branches of the sacramentality of sounds, with their correspondent colours, instruments, bearing, &c. &c., and so of others?
  1845, Clergymen of the Church of England, editors, The Christian’s Monthly Magazine and Church of England Review, volume IV, London: Simpkin, Marshall, & Co., pages 364–365
2. (law) Used to connect the different names of a person who has gone by two or more, and whose true name is for any cause doubtful
noun
plural aliases
1. Another name; an assumed name.
2. (law) A second or further writ which is issued after a first writ has expired without effect.
3. (computing) An abbreviation that replaces a string of commands and thereby reduces typing when performing routine actions or tasks.
4. (signal processing) An spurious signal generated as a technological artifact.
verb
third-person singular simple present aliases, present participle aliasing, simple past and past participle aliased
1. (computing) To assign an additional name to an entity, often a more user-friendly one.
2. (signal processing, of two signals, transitive, intransitive) To make or become indistinguishable.
  Quotations
  When the signal frequency reaches half the sampling frequency, there are only two samples per cycle, which is the absolute minimum needed to record a waveform. A higher frequency would cause the digitization system to alias.
  1989, Ken C. Pohlmann, The compact disc: a handbook of theory and use, page 22
  Finally, as it is a frequency detection technique, color Doppler US has the potential to alias
  1999, Carlo Bartolozzi with Riccardo Lencioni, Liver malignancies: diagnostic and interventional radiology, page 59
  This technique can be used to alias the L1 and L2 bands of the GPS into the baseband
  2005, James Bao-yen Tsui, Fundamentals of global positioning system receivers, page 106