American English

Definition of fundamentally adverb from the Oxford Advanced American Dictionary

      

    fundamentally

     adverb
    adverb
    NAmE//ˌfʌndəˈmɛntl̩i//
     
     
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  1. 1in every way that is important; completely The two approaches are fundamentally different. By the 1960s, the situation had changed fundamentally. They remained fundamentally opposed to the plan.
  2. 2used when you are introducing a topic and stating something important about it synonym basically Fundamentally, there are two different approaches to the problem.
  3. 3used when you are saying what is the most important thing about someone or something synonym basically She is fundamentally a nice person, but she finds it difficult to communicate.
See the Oxford Advanced Learner's Dictionary entry: fundamentally