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
Rachel CericolaThese e-mail addresses generally look like this: "username@location.xxx".—Walter S. Mossberg
Walter S. Mossbergcalled also user ID
Examples of username in a Sentence
Recent Examples on the Web
The website also hosts an active leaderboard displaying the usernames of top buyers.
—Mackenzie Sigalos,kevin Collier, CNBC, 25 Apr. 2025
The poster writes in the video shared on Monday under the username @turntleaf, as her cat sits down in front of the window, watching the world outside in awe.
—Thomas G. Moukawsher, MSNBC Newsweek, 25 Apr. 2025
Credentials: Single-factor authentication is based on the simple model of a username and password used for identity verification.
—Morey Haber, Forbes.com, 22 Apr. 2025
Under the username @AbilityFunny1412, the passenger began with a disclaimer about their love for the Delta Sky Club Lounge.
—Natalia Senanayake, People.com, 14 Apr. 2025
See All Example Sentences for username
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Mackenzie Sigalos,kevin Collier, CNBC, 25 Apr. 2025
The poster writes in the video shared on Monday under the username @turntleaf, as her cat sits down in front of the window, watching the world outside in awe.
—Thomas G. Moukawsher, MSNBC Newsweek, 25 Apr. 2025
Credentials: Single-factor authentication is based on the simple model of a username and password used for identity verification.
—Morey Haber, Forbes.com, 22 Apr. 2025
Under the username @AbilityFunny1412, the passenger began with a disclaimer about their love for the Delta Sky Club Lounge.
—Natalia Senanayake, People.com, 14 Apr. 2025
See All Example Sentences for username
Cite this Entry
“Username.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/username. Accessed 5 May. 2025.
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