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



BrE BrE//ˌfʌndəˈmentl//
; NAmE NAmE//ˌfʌndəˈmentl//
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[usually plural] 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 the Oxford Advanced American Dictionary entry: fundamental