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
According to three people close to the sale, there had been signs of trouble from the beginning of the auction house’s relationship with the seller, who operated from behind the username 0x650d.
—Zachary Small, New York Times, 18 May 2024
Editors' Choice winner Signal allows users to designate a username and hide their phone number from contacts after signing up, which adds a layer of anonymity to the service.
—PCMAG, 15 May 2024
Other pieces of information that could have been compromised are IP addresses, account usernames, and data on how members used the Kaiser website.
—Karen Garcia, Los Angeles Times, 2 May 2024
Ultimately, the law is looking to prevent incidents like the Mirai botnet DDoS attack in 2016, which used a short list of 62 common default usernames and passwords to scan for vulnerable devices and ensnared nearly 300,000 devices.
—Joe Hindy, PCMAG, 30 Apr. 2024
See all Example Sentences for username 
Zachary Small, New York Times, 18 May 2024
Editors' Choice winner Signal allows users to designate a username and hide their phone number from contacts after signing up, which adds a layer of anonymity to the service.
—PCMAG, 15 May 2024
Other pieces of information that could have been compromised are IP addresses, account usernames, and data on how members used the Kaiser website.
—Karen Garcia, Los Angeles Times, 2 May 2024
Ultimately, the law is looking to prevent incidents like the Mirai botnet DDoS attack in 2016, which used a short list of 62 common default usernames and passwords to scan for vulnerable devices and ensnared nearly 300,000 devices.
—Joe Hindy, PCMAG, 30 Apr. 2024
See all Example Sentences for username
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'username.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near username
Cite this Entry
“Username.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/username. Accessed 6 Jun. 2024.
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