us·​er·​name | \ ˈyü-zər-ˌnām How to pronounce username (audio) \
variants: or less commonly user name
plural usernames also user names

Definition of username

: 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: "".— Walter S. Mossberg

called also user ID

Examples of username in a Sentence

Recent Examples on the Web Wickr requires no personal information to sign up, unlike its competitors WhatsApp and Signal, asking only for a username and password. Ben Goggin, NBC News, 10 June 2022 Even when this data is publicly available online, such as a username, it can potentially still be exploited by bad actors if it's lumped together with other personal information such as birthdates, email addresses and location. Clare Duffy, CNN, 15 Dec. 2021 Chef Pii, by the way, is her TikTok username, not her real name. Los Angeles Times, 27 July 2022 The 3-year-old TikTok star at the center of the movement, with the username @wren.eleanor, has more than 17 million followers on the short-form video app run by her mother, Jacquelyn. Audrey Conklin, Fox News, 26 July 2022 Spotify says the display name will replace the username shown on the profile, app and playlists. Mythili Devarakonda, USA TODAY, 19 June 2022 Tap on the three dots on a tweet in which your username is mentioned. Jacob Siegal, BGR, 11 July 2022 In a different Discord server, a user with the same username as the Twitch account that streamed the Buffalo attack made what appeared to be a to-do list related to the shooting. Wilson Wong, NBC News, 6 July 2022 Under your current username/display name, there’s an option to Edit Profile – tap it. Mythili Devarakonda, USA TODAY, 19 June 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'username.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of username

1971, in the meaning defined above

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Time Traveler for username

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The first known use of username was in 1971

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Dictionary Entries Near username

user interface



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Last Updated

12 Aug 2022

Cite this Entry

“Username.” Dictionary, Merriam-Webster, Accessed 17 Aug. 2022.

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More Definitions for username


us·​er·​name | \ ˈyü-zər-ˌnām How to pronounce username (audio) \

Kids Definition of username

: a combination of letters and often numbers that identifies a user when logging on to a computer or website

More from Merriam-Webster on username

Nglish: Translation of username for Spanish Speakers

Britannica English: Translation of username for Arabic Speakers


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