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.

---

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

---

Etymology

Origin of username

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

Example Sentences

Ilyas Lebleu, an A.I. research student based in France who edits Wikipedia under the username Chaotic Enby, first wrote the proposal that was debated and adopted as the site’s A.I. ban.

From Slate

Nigel Dewale, 60, sent the posts to Carter's TikTok account, under his username "Bogeyman", during the Women's Euro 2025 tournament in which England successfully defended their trophy.

From BBC

The agent determined that the host computer had software with the username “astro99999” and an IP address linked to McClain’s home address in Menifee.

From Los Angeles Times

A self-proclaimed menswear industry insider who goes by the username @rfkenmore on X told the Journal that most of his younger male friends in finance stick with under-the-radar brands like J.Crew and Lululemon for work wear.

From The Wall Street Journal

She can be reached on Signal at the username JournoLiz.80.

From The Wall Street Journal