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.

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.

You use fundamental to describe things, activities, and principles that are very important or essential.

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. …