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Definition of user ID noun from the Oxford Advanced Learner's Dictionary

user ID

noun
 
/ˌjuːzər ˌaɪ ˈdiː/
 
/ˌjuːzər ˌaɪ ˈdiː/
(also username)
(computing)
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  1. the name you use in order to be able to use a computer program or system
    • Please enter your user ID.
    Topics Computersb2
See user ID in the Oxford Advanced American Dictionary
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piano
noun
 
 
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