1 relating to the basic nature or character of something
a fundamental flaw/weakness (=something basic that is wrong): Some people see this as a fundamental flaw in his argument.
fundamental changes: We shall have to make some fundamental changes in the way we do business.
fundamental difference: There was an even more fundamental difference in attitude between us.
fundamental principle/issue/question: A fundamental principle of Anglo-American law is that crimes must be clearly defined.
Synonyms and related words