The meaning of FUNDAMENTAL is serving as a basis supporting existence or determining essential structure or function : basic. How to use fundamental in a sentence. Synonym …

FUNDAMENTAL definition: serving as, or being an essential part of, a foundation or basis; basic; underlying. See examples of fundamental used in a sentence.

FUNDAMENTAL definition: 1. forming the base, from which everything else develops: 2. more important than anything else…. Learn more.

7 meanings: 1. of, involving, or comprising a foundation; basic 2. of, involving, or comprising a source; primary 3. music.... Click for more definitions.

Define fundamental. fundamental synonyms, fundamental pronunciation, fundamental translation, English dictionary definition of fundamental. adj. 1. a. Of or relating to the foundation or base; …

Dec 14, 2025 · fundamental (plural fundamentals) (generic, singular) A basic truth, elementary concept, principle, rule, or law. An individual fundamental will often serve as a building block …

underlying: fundamental principles; the fundamental structure. of, pertaining to, or affecting the foundation or basis: a fundamental revision. being an original or primary source: a …

Definition of fundamental adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

fundamental, adj. & n. meanings, etymology, pronunciation and more in the Oxford English Dictionary

FUNDAMENTAL meaning: 1 : forming or relating to the most important part of something basic often + to; 2 : of or relating to the basic structure or function of something