say it: AY-lee-uhs
alias is a noun and adverb meaning "a name that has been assumed temporarily". It carries 2 recorded senses.
a name that has been assumed temporarily
as known or named at another time or place
“Mr. Smith, alias Mr. Lafayette”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for alias come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.