Fundamental

Fundamental may refer to:
* Fundamental frequency,a concept in music or phonetics, often referred to as simply a "fundamental".
* Fundamentalism, the belief in, and usually the strict adherence to, the simplistic or "fundamental" ideas based on faith of a system of thought. Interestingly not based on the fundamental principles or objectives of a system. i.e. following the word and not the spirit of a law or system.
* Any of a number of fundamental theorems identified in mathematics, such as
** The fundamental theorem of algebra, a theorem regarding the factorization of polynomials.
** The fundamental theorem of arithmetic, a theorem regarding prime factorization.
* Fundamental analysis, a method that uses financial and economic analysis to predict the movement of security prices such as bond prices, but more commonly stock prices.

In music:
* "Fundamental (Bonnie Raitt album)"
* "Fundamental (Pet Shop Boys album)"
* "Fundamental (Puya album)"
* Fun-Da-Mental, a rap group.