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
Windows users, by default, use a Microsoft ID to log in to their system, with an option to set up separate accounts with different usernames—this is one of the few ways Windows can be simpler than macOS.
—Edward Mendelson, PC Magazine, 3 June 2025
In a viral video shared on the platform in May under the username @captainthegoldie, the puppy, Captain, can be seen cautiously stepping outside to go potty in the storm, when a bright flash lights up the yard, followed by a loud rumble.
—Maria Azzurra Volpe, MSNBC Newsweek, 2 June 2025
These include email addresses, passwords, usernames and URLs for platforms such as Google, Microsoft, Apple, Facebook and Snapchat.
—Kurt Knutsson, FOXNews.com, 31 May 2025
By interpreting usernames as part of the broader narrative an account presents, AI systems can better evaluate whether an identity is manufactured to gain trust, blend into a target community or amplify persuasive content.
—Azwad Anjum Islam, The Conversation, 29 May 2025
See All Example Sentences for username
Examples are automatically compiled from online sources to
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Edward Mendelson, PC Magazine, 3 June 2025
In a viral video shared on the platform in May under the username @captainthegoldie, the puppy, Captain, can be seen cautiously stepping outside to go potty in the storm, when a bright flash lights up the yard, followed by a loud rumble.
—Maria Azzurra Volpe, MSNBC Newsweek, 2 June 2025
These include email addresses, passwords, usernames and URLs for platforms such as Google, Microsoft, Apple, Facebook and Snapchat.
—Kurt Knutsson, FOXNews.com, 31 May 2025
By interpreting usernames as part of the broader narrative an account presents, AI systems can better evaluate whether an identity is manufactured to gain trust, blend into a target community or amplify persuasive content.
—Azwad Anjum Islam, The Conversation, 29 May 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 7 Jun. 2025.
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