username

noun

us·​er·​name ˈyü-zər-ˌnām How to pronounce username (audio)
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
These e-mail addresses generally look like this: "username@location.xxx".Walter S. Mossberg

called also user ID

Examples of username in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
In a viral TikTok video shared on Monday under the username @lifeaedean, the worker can be seen putting on his one remaining shoe, as a customer's dog parades his other shoe around like a trophy after stealing it from him. Maria Azzurra Volpe, MSNBC Newsweek, 26 June 2025 If your web browser automatically populates your username and password for you, make sure this information is free of typos. Kurt Knutsson, FOXNews.com, 22 June 2025 Several TikTok creators shared their Roblox usernames in their videos to encourage people to join their upcoming protests; many of them appeared to be young. Alyssa Mercante, Rolling Stone, 20 June 2025 An investigation found the same username recently made several other anti-LGBTQ+ posts on various social media platforms, the complaint shows. Silas Morgan, The Orlando Sentinel, 18 June 2025 See All Example Sentences for username

Word History

First Known Use

1971, in the meaning defined above

Time Traveler
The first known use of username was in 1971

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Cite this Entry

“Username.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/username. Accessed 2 Jul. 2025.

Kids Definition

username

noun
: a sequence of characters that identifies a user when logging onto a computer or website

called also user ID

More from Merriam-Webster on username

Last Updated: - Updated example sentences
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