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English definition of “fundamental”

fundamental

adjective  /ˌfʌn·dəˈmen·təl/ us  
being the most basic or most important thing on which other things depend: fundamental beliefs/principles We need to make fundamental changes in the way we treat our environment.
fundamentally
adverb [not gradable]  /ˌfʌn·dəˈmen·təl·i/ us  
Their economy was fundamentally (= basically) in good shape.
fundamentals
plural noun  /ˌfʌn·dəˈmen·təlz/ us  
In the early grades, children learn the fundamentals of reading.
(Definition of fundamental from the Cambridge Academic Content Dictionary © Cambridge University Press)
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