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
Lavina Sab, who posts to TikTok under the username @livin.lavina.loca, racked up over 8 million views and 1.2 million likes in just three days after posting a video asking a simple question.
—Michael Gfoeller and David H. Rundell, Newsweek, 16 Jan. 2025
TikTok users can also download their account data, including usernames, followers, and message history.
—Mike Snider, USA TODAY, 15 Jan. 2025
You will be prompted to create a username and a secure password and enter your preferred email address.
—Matthew Gover, Miami Herald, 6 Jan. 2025
Enter the existing default admin username and password.
—Davey Winder, Forbes, 5 Jan. 2025
See all Example Sentences for username 
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Michael Gfoeller and David H. Rundell, Newsweek, 16 Jan. 2025
TikTok users can also download their account data, including usernames, followers, and message history.
—Mike Snider, USA TODAY, 15 Jan. 2025
You will be prompted to create a username and a secure password and enter your preferred email address.
—Matthew Gover, Miami Herald, 6 Jan. 2025
Enter the existing default admin username and password.
—Davey Winder, Forbes, 5 Jan. 2025
See all Example Sentences for username
Dictionary Entries Near username
Cite this Entry
“Username.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/username. Accessed 31 Jan. 2025.
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