username

noun

us·​er·​name ˈyü-zər-ˌnām 

variants or less commonly user name

plural usernames also user names

: a sequence of characters that identifies a user (such as on a computer system, website, or social media platform)

Never reuse a username and password combination. While doing so is convenient, if that combination is ever stolen from one service you use … it will expose every service you have that uses it.

—Rachel Cericola

These e-mail addresses generally look like this: "[e-mail]".

—Walter S. Mossberg

called also user ID

Examples of username in a Sentence

Recent Examples on the Web

According to three people close to the sale, there had been signs of trouble from the beginning of the auction house’s relationship with the seller, who operated from behind the username 0x650d. —Zachary Small, New York Times, 18 May 2024

Editors' Choice winner Signal allows users to designate a username and hide their phone number from contacts after signing up, which adds a layer of anonymity to the service. —PCMAG, 15 May 2024

Word History

First Known Use

1971, in the meaning defined above

Kids Definition

username

noun

: a sequence of characters that identifies a user when logging onto a computer or website

called also user ID