Definition of Adam noun from the Oxford Advanced Learner's Dictionary

 

Adam

 noun
noun
BrE BrE//ˈædəm//
 
; NAmE NAmE//ˈædəm//
 
 
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Word Originfrom Hebrew 'ād̲ām ‘man’, later taken to be a name.Idioms
not know somebody from Adam
 
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(informal) to not know at all who somebody is
See the Oxford Advanced American Dictionary entry: Adam