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 clip shared in November, under the username @kerrilonglive, the tuxedo cat can be seen lying on top of his dad, as the poster films him, looking like he's got a massive body attached to a regular-size head. —Josh Hammer, Newsweek, 24 Dec. 2024

The app recently introduced usernames, enabling users to connect without sharing phone numbers, adding another layer of anonymity. —Lars Daniel, Forbes, 20 Dec. 2024

Threads spokesperson Alec Booker tells The Verge that tapping on the username will show a list of posts using the media, with the original post appearing at the top. —Emma Roth, The Verge, 18 Dec. 2024

When the publication typed a credit card number and a username and password into a Notepad window, they were gathered in the screenshots. —Matt Burgess, WIRED, 14 Dec. 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