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noun, plural a·li·as·es.
  1. a false name used to conceal one's identity; an assumed name: The police files indicate that “Smith” is an alias for Simpson.
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  1. at another time; in another place; in other circumstances; otherwise. “Simpson alias Smith” means that Simpson in other circumstances has called himself Smith.
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Origin of alias

1525–35; < Latin aliās (adv.): at another time, otherwise; cf. else


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alias dictus

[ah-lee-ahs dik-too s; English ey-lee-uh s dik-tuh s]
adverb Latin.
  1. otherwise called; alias.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for alias


  1. at another time or place known as or namedDylan, alias Zimmerman
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noun plural -ases
  1. an assumed name
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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

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).

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

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Online Etymology Dictionary, © 2010 Douglas Harper