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
Save screenshots of texts, wallet addresses, usernames, websites, transaction IDs, emails and phone numbers.
—Kurt Knutsson, FOXNews.com, 15 June 2026
The content creator and Philadelphia native, whose real name is Brandon Edelman, just celebrated his first anniversary with his boyfriend, Jason Suerte, who goes by the TikTok username UrInternetBF7.
—Meredith Wilshere, PEOPLE, 13 June 2026
The hackers eventually followed through, releasing thousands of usernames and email addresses tied to Ashley Madison accounts.
—Marina Watts, Entertainment Weekly, 9 June 2026
For the specific comment referenced, the police report includes the commenter’s Instagram username, which links to an account with five followers and zero posts.
—Miami Herald, 9 June 2026
See All Example Sentences for username
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Kurt Knutsson, FOXNews.com, 15 June 2026
The content creator and Philadelphia native, whose real name is Brandon Edelman, just celebrated his first anniversary with his boyfriend, Jason Suerte, who goes by the TikTok username UrInternetBF7.
—Meredith Wilshere, PEOPLE, 13 June 2026
The hackers eventually followed through, releasing thousands of usernames and email addresses tied to Ashley Madison accounts.
—Marina Watts, Entertainment Weekly, 9 June 2026
For the specific comment referenced, the police report includes the commenter’s Instagram username, which links to an account with five followers and zero posts.
—Miami Herald, 9 June 2026
See All Example Sentences for username
Cite this Entry
“Username.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/username. Accessed 19 Jun. 2026.
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