alias

UK: /ˈeɪliəs/ US: /ˈeɪliəs/ ,(ā′lē əs)

Inflections of 'alias' (n): npl: aliases

WordReference Random House Learner's Dictionary of American English © 2025

a•li•as /ˈeɪliəs/   n., pl. -as•es, adv. 
n. [countable]

1. an additional or assumed name:
   The novelist wrote under an alias.

adv. 

2. otherwise called:
   "Smithers alias Smith'' means that Smithers in other circumstances has called himself Smith.

See -ali- .

WordReference Random House Unabridged Dictionary of American English © 2025

a•li•as  (ā′lē əs), n., pl. -as•es, adv. 
n. 

1. a false name used to conceal one's identity;
   an assumed name:
   The police files indicate that "Smith'' is an alias for Simpson.

adv. 

2. at another time;
   in another place;
   in other circumstances;
   otherwise. "Simpson alias Smith'' means that Simpson in other circumstances has called himself Smith.

• Latin aliās (adverb, adverbial): at another time, otherwise; compare else
• 1525–35

Synonyms

• 1. nom de guerre; nom de plume, pseudonym.

Collins Concise English Dictionary © HarperCollins Publishers::

alias / ˈeɪlɪəs/ adverb

1. at another time or place known as or named: Katy Perry, alias Hudson

noun ( -ases)

1. an assumed name

Etymology: 16th Century: from Latin aliās (adv) otherwise, at another time, from alius other