fundamental

adj. basic, elemental; essential

n. principle, basis, essential; fundamental note, lowest note of a chord (Music)

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 asThe 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.
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Noun
1. the lowest tone of a harmonic series
(synonym) fundamental frequency, first harmonic
(hypernym) harmonic
Adjective
1. serving as an essential component; "a cardinal rule"; "the central cause of the problem"; "an example that was fundamental to the argument"; "computers are fundamental to modern industrial structure"
(synonym) cardinal, central, key, primal
(similar) important, of import
2. being or involving basic facts or principles; "the fundamental laws of the universe"; "a fundamental incompatibility between them"; "these rudimentary truths"; "underlying principles"
(synonym) rudimentary, underlying
(similar) basic
3. far-reaching and thoroughgoing in effect especially on the nature of something; "the fundamental revolution in human values that has occurred"; "the book underwent fundamental changes"; "committed the fundamental error of confusing spending with extravagance"; "profound social changes"
(synonym) profound
(similar) significant, important

adj. fundamental, basic, elemental; essential

adj. fundamental, basic; essential; basal; primal; ultimate; underlying; keynote; root

n. fundamental, principle