# username

/ˈjuzɝˌneɪm/ (US) · /jˈuːzənˌeɪm/ (UK) · CEFR A2 · Noun

Source: https://englishreference.com/word/username
Updated: 2026-07-22

## Definition

the unique name you use to identify yourself when you log in to a computer system or website.

For teachers: a unique sequence of characters used to identify a specific user during the authentication process on a computer system or network.

## Examples

- Please enter your username and password to log in.
- When you create a new account, the system checks if your chosen username is already taken by another person.
- For security reasons, the administrator recommends choosing a username that does not contain your real name or any easily identifiable personal information.

## Usage notes

- Often paired with 'password' in the context of digital security.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.