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

fundamental

noun
 
/ˌfʌndəˈmentl/
 
/ˌfʌndəˈmentl/
[usually plural]
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  1. a basic rule or principle; an essential part
    • the fundamentals of modern physics
    • He taught me the fundamentals of the job.
    Word Originlate Middle English: from French fondamental, or late Latin fundamentalis, from Latin fundamentum, from fundare ‘to found’.
See fundamental in the Oxford Advanced American Dictionary
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valid
adjective
 
 
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