username

American  

[yoo-zer-neym] / ˈyu zərˌneɪm /

noun

Computers.

1. Also called sign-in name,.  Also called login name,.  Also called sign-on name.  Also called logon name,.  a unique sequence of characters used to identify a user and allow access to a computer system, computer network, or online account.

2. the part of an email address before the @ sign.

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username British  

/ ˈjuːzəˌneɪm /

noun

1. computing a name that someone uses for identification purposes when logging onto a computer, using chatrooms, or as part of his or her e-mail address

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Etymology

Origin of username

First recorded in 1970–75; user ¹ ( def. ) + name ( def. )