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
Bridget — who goes by username SimplyBridget12 — has been transparent about her weight loss on social media.
—Vanessa Etienne, People.com, 26 Mar. 2025
Alfaro is suspected to have used the following usernames: mr_jointz, val.91503836, 8o5_joeyy, scv_joeyy1, kim.9120123, mia.7477289 and cfs3.99771776.
—Jasmine Mendez, Los Angeles Times, 26 Mar. 2025
In a viral TikTok video shared earlier in March under the username @itsimoandjames, the pregnant cat can be seen insistently trying to get into the couple's room despite their efforts to keep her away from the door.
—Daniel R. Depetris, Newsweek, 25 Mar. 2025
The names cited from text messages are Signal usernames as reported by The Atlantic.
—Erin Mansfield, USA TODAY, 25 Mar. 2025
See All Example Sentences for username
Examples are automatically compiled from online sources to
show current usage.
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Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
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Vanessa Etienne, People.com, 26 Mar. 2025
Alfaro is suspected to have used the following usernames: mr_jointz, val.91503836, 8o5_joeyy, scv_joeyy1, kim.9120123, mia.7477289 and cfs3.99771776.
—Jasmine Mendez, Los Angeles Times, 26 Mar. 2025
In a viral TikTok video shared earlier in March under the username @itsimoandjames, the pregnant cat can be seen insistently trying to get into the couple's room despite their efforts to keep her away from the door.
—Daniel R. Depetris, Newsweek, 25 Mar. 2025
The names cited from text messages are Signal usernames as reported by The Atlantic.
—Erin Mansfield, USA TODAY, 25 Mar. 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 Apr. 2025.
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