alias

1 of 2

noun

ali·​as ˈā-lē-əs 

ˈāl-yəs

plural aliases

: an assumed or additional name that a person sometimes uses

a fugitive using several aliases

John Smith, who goes by the alias Richard Jones

He checked into the hotel using an alias. = He checked into the hotel under an alias.

"My [gaming] alias when I was 18 … was Princess Peach," she [Bella Hadid] says with glee …

—Alex Frank

sometimes, specifically : a pseudonym (such as a pen name or stage name) that is associated with a person's professional identity

wrote the novels under an alias

Donald Glover, also known under his rap alias Childish Gambino, is an actor, writer, director, comedian and musician.

—Mark Warren

Vin Diesel, born Mark Sinclair, took on the tougher-sounding moniker as a bouncer in New York; the alias stuck as he transitioned into acting.

—Mae Ross

alias

2 of 2

adverb

: otherwise called : otherwise known as

—used to indicate an additional name that a person sometimes uses

John Smith alias Richard Jones

the outlaw William H. Bonney, Jr. alias "Billy the Kid"

Synonyms of alias

Noun

• nickname
• surname
• moniker
• epithet

Examples of alias in a Sentence

Noun

a fugitive using several aliases

a dressmaker whom everyone knows as “Bet,” her adopted alias in the dressmaking business that she named after Betsy Ross

Recent Examples on the Web

Noun

The new season of Prime Video's high-octane thriller jumps eight years ahead of the explosive Season 1 finale with Pine running a quiet surveillance unit in London under the alias Alex Goodwin, a low-level MI6 officer. —Saman Shafiq, USA Today, 8 Jan. 2026

Roper is dead, and Pine has been keeping a low profile under the alias Alex Goodwin. —Allison Degrushe, Entertainment Weekly, 8 Jan. 2026

This can limit the usefulness of aliases for certain sign-ups. —Kurt Knutsson, FOXNews.com, 3 Jan. 2026

For comparison, services like Outlook and Proton Mail already support aliases. —Aamir Khollam, Interesting Engineering, 25 Dec. 2025

Word History

Etymology

Noun

noun derivative of alias entry 2

Adverb

Middle English, borrowed from Medieval Latin aliās (short for aliās dictus "at other times called"), going back to Latin, "at other times, in other cases, otherwise," from alius "other" + -ās, adverbial suffix (perhaps accusative plural ending, with noun vicēs "turns, times" understood) — more at else

First Known Use

Noun

1605, in the meaning defined above

Adverb

15th century, in the meaning defined above

Phrases Containing alias

• under an alias

Kids Definition

alias

1 of 2 adverb

ˈā-lē-əs, 

ˈāl-yəs

: otherwise called : otherwise known as

John Doe alias Richard Roe

alias

2 of 2 noun

: an assumed or additional name

Legal Definition

alias

1 of 3 adverb

ˈā-lē-əs, ˈāl-yəs 

: otherwise called : also known as

John Thomas Nolan, alias Legs Diamond

alias

2 of 3 noun

: an assumed or additional name

alias

3 of 3 adjective

: issued after the original instrument has not produced any action

an alias tax warrant

an alias summons

compare pluries

Etymology

Adverb

Latin, otherwise, from alius other