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English definition of “username”

username

noun [C]     /ˈjuː.zə.neɪm/ US  /-zɚ-/ (also user ID)
a name or other word that you sometimes need to type in together with a password before you are allowed to use a computer or the internet: Please enter your username and password.Operating computers
(Definition of username noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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