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 video shared on TikTok on Monday under the username @danajoyyy, the pup can be seen sitting at the dinner table with her owners, politely eating her kibble from a bowl while her owners have their dinner. —Ross Rosenfeld, Newsweek, 26 Feb. 2025

Like seemingly everything in our lives, this app requires a username and password. —Jessica Hartshorn, Flow Space, 25 Feb. 2025

In a video that has since gone viral on TikTok, King (whose username is @courtneyyyking) wakes her niece to share the exciting news. —Andrea Wurzburger, People.com, 21 Feb. 2025

Later the same day, the account appeared to have been restored with a new username. —Adam Crafton, The Athletic, 19 Feb. 2025

Word History

First Known Use

1971, in the meaning defined above

Rhymes for username

• aspartame
• counterclaim
• overcame
• underframe
• acclaim
• aflame
• airframe
• ballgame
• became
• declaim
• defame
• disclaim

Kids Definition

username

noun

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

called also user ID