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[ey-lee-uh s] /ˈeɪ li əs/
noun, plural aliases.
a false name used to conceal one's identity; an assumed name:
The police files indicate that “Smith” is an alias for Simpson.
at another time; in another place; in other circumstances; otherwise. “Simpson alias Smith” means that Simpson in other circumstances has called himself Smith.
Origin of alias
1525-35; < Latin aliās (adv.): at another time, otherwise; cf. else
1. nom de guerre; nom de plume, pseudonym.

alias dictus

[ah-lee-ahs dik-too s; English ey-lee-uh s dik-tuh s] /ˈɑ li ɑs ˈdɪk tʊs; English ˈeɪ li əs ˈdɪk təs/
adverb, Latin.
otherwise called; alias. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for alias


at another time or place known as or named: Dylan, alias Zimmerman
noun (pl) -ases
an assumed name
Word Origin
C16: from Latin aliās (adv) otherwise, at another time, from alius other
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for alias

mid-15c., "otherwise called," from Latin alias "at another time, in another way," from alius "(an)other," from PIE *al- "beyond" (cf. Sanskrit anya "other, different," Avestan anya-, Armenian ail, Greek allos "another," Gothic aljis "other," Old English elles "otherwise, else," Modern English else).


"assumed name," c.1600, from alias (adv.).

Online Etymology Dictionary, © 2010 Douglas Harper
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alias in Technology

1. A name, usually short and easy to remember and type, that is translated into another name or string, usually long and difficult to remember or type. Most command interpreters (e.g. Unix's csh) allow the user to define aliases for commands, e.g. "alias l ls -al". These are loaded into memory when the interpreter starts and are expanded without needing to refer to any file.
2. One of several alternative hostnames with the same Internet address. E.g. in the Unix hosts database (/etc/hosts or NIS map) the first field on a line is the Internet address, the next is the official hostname (the "canonical name" or "CNAME"), and any others are aliases.
Hostname aliases often indicate that the host with that alias provides a particular network service such as archie, finger, FTP, or World-Wide Web. The assignment of services to computers can then be changed simply by moving an alias (e.g. from one Internet address to another, without the clients needing to be aware of the change.
3. The name used by Apple computer, Inc. for symbolic links when they added them to the System 7 operating system in 1991.
4. Two names (identifiers), usually of local or global variables, that refer to the same resource (memory location) are said to be aliased. Although names introduced in programming languages are typically mapped to different memory locations, aliasing can be introduced by the use of address arithmetic and pointers or language-specific features, like C++ references.
Statically deciding (e.g. via a program analysis executed by a sophisticated compiler) which locations of a program will be aliased at run time is an undecidable problem.
[G. Ramalingam: "The Undecidability of Aliasing", ACM Transactions on Programming Languages and Systems (TOPLAS), Volume 16, Issue 5, September 1994, Pages: 1467 - 1471, ISSN:0164-0925.]

The Free On-line Dictionary of Computing, © Denis Howe 2010
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