The meaning of FUNDAMENTAL is serving as a basis supporting existence or determining essential structure or function : basic.

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

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

2 days ago · San Francisco, CA - February, 5th 2026 – Fundamental, an AI company that has built its most powerful Large Tabular Model (“LTM”) to drive predictions from enterprise data, announced …

You use fundamental to describe things, activities, and principles that are very important or essential. They affect the basic nature of other things or are the most important element upon which other …

Jan 20, 2026 · Noun [edit] fundamental (plural fundamentals) (generic, singular) A basic truth, elementary concept, principle, rule, or law. An individual fundamental will often serve as a building …

basic: fundamental principles of physics. essential: a fundamental revision of a theory. being a starting point: a fundamental idea. a basic principle, rule, law, or the like: the fundamentals of engineering. …

1. serving as, or being an essential part of, a foundation or basis; basic; underlying: fundamental principles. 2. of, pertaining to, or affecting the foundation or basis: a fundamental revision. 3. being …

fundamental meaning, definition, what is fundamental: relating to the most basic and important...: Learn more.

There are 17 meanings listed in OED's entry for the word fundamental, three of which are labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.