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English definition of “alias”

alias

preposition uk   /ˈeɪ.li.əs/ us  
used when giving the name that a person is generally known by, after giving their real name: Malcolm Little, alias Malcolm X

alias

noun [C] uk   /ˈeɪ.li.əs/ us  
a false name, especially one used by a criminal: He travels under (= using) an alias.
(Definition of alias from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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