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
Jacob, a 22-year-old theme park marketing professional who posts under the username @jacob_backall, curated a slideshow of his 30 favorite roller coasters drawn from a personal experience of trying 492 different roller coasters so far across multiple continents.
—Soo Kim, MSNBC Newsweek, 2 Aug. 2025
The victim provided detectives with Newton’s Snapchat username and called the man on Snapchat to confirm his identity, according to court documents.
—Caroline Zimmerman, Kansas City Star, 24 July 2025
However, despite the persistently positive consumer response regarding this phenomenon, the beginnings of an objection was recently articulated by Ayo Ojo, a popular online fashion critique and analyst who posts content on several social media platforms under the username @fashionroadman.
—Elizabeth Grace Coyne, Forbes.com, 20 July 2025
When an unsuspecting visitor logs in, the fraudsters capture the username and password and thereby own the account.
—PC Magazine, 20 July 2025
See All Example Sentences for username
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Soo Kim, MSNBC Newsweek, 2 Aug. 2025
The victim provided detectives with Newton’s Snapchat username and called the man on Snapchat to confirm his identity, according to court documents.
—Caroline Zimmerman, Kansas City Star, 24 July 2025
However, despite the persistently positive consumer response regarding this phenomenon, the beginnings of an objection was recently articulated by Ayo Ojo, a popular online fashion critique and analyst who posts content on several social media platforms under the username @fashionroadman.
—Elizabeth Grace Coyne, Forbes.com, 20 July 2025
When an unsuspecting visitor logs in, the fraudsters capture the username and password and thereby own the account.
—PC Magazine, 20 July 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 6 Aug. 2025.
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