컴퓨터 시스템, 네트워크, 또는 웹사이트에 접속할 때 특정 사용자를 식별하기 위해 사용하는 고유한 이름.
A unique name or string of characters used to identify a specific person when logging into a computer system, network, or online service.
예문:
"Please enter your username and password to access your account."
"The website told me that the username I wanted was already taken."
"You can use your email address as your username for this application."