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 TikTok video shared under the username @meredithonthemap, which has had over 13,000 views since it was posted on November 8, Meredith Pierce, a 31-year-old social media marketer from Atlanta, Georgia, discussed her approach to spending the holiday abroad. —Yaakov Katz, Newsweek, 27 Nov. 2024

Without this layer, the attackers were able to enter the system with only a username and password. —Lars Daniel, Forbes, 26 Nov. 2024

There’s usually a link that leads to a fake Apple site, asking you to enter your username, password and additional personal details to reactivate your account. —Kurt Knutsson, Cyberguy Report, Fox News, 24 Nov. 2024

Data from the breach, verified by WIRED, includes more than 700,000 usernames and reportedly includes messages from 221 public and 395 private chat servers. —Dhruv Mehrotra, WIRED, 23 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