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

In a viral TikTok video shared in September under the username @thesheinshenanigans, the poster walks into the kitchen to find her corn chewed off on one side, as if someone has been eating it. —Gordon G. Chang, Newsweek, 12 Dec. 2024

However, the deal, which still requires the judge's approval, is unclear on what would then happen to the Infowars username. —Tovia Smith, NPR, 10 Dec. 2024

Change usernames and passwords that may have been compromised. —Emily Barnes, USA TODAY, 21 Nov. 2024

The couple seem to have each other’s usernames on their Instagram bios and constantly update their joint account @jamesandmeitalia90day with their travels and daily life. —Lea Veloso, StyleCaster, 18 Nov. 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