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

These e-mail addresses generally look like this: "[e-mail]".

—Walter S. Mossberg

called also user ID

Examples of username in a Sentence

Recent Examples on the Web

The adversary enters the username of a privileged user and an arbitrary incorrect password. 2. —Dan Goodin, Ars Technica, 9 July 2024

Achieving influencer status can come down to capitalizing on viral moments, such as when Mitt Romney was revealed to have a secret Twitter account, with the username Pierre Delecto. —E. Tammy Kim, The New Yorker, 27 June 2024

The ensuing conversation involved dozens of anonymous people posting with Reddit usernames, but the initial post carried enough credibility that Sen. Matt Lesser and Cromwell Mayor James Demetriades got involved. —Don Stacom, Hartford Courant, 7 Mar. 2024

In the viral video, shared on TikTok on Monday, under the username @diagnasuarez340, the protective pup can be seen consistently blocking the boyfriend's attempts to touch his girlfriend, using its paws and muzzle to push his hand away. —David Faris, Newsweek, 10 July 2024

Word History

First Known Use

1971, in the meaning defined above

Kids Definition

username

noun

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

called also user ID