Difference between Fundamental and Overtone

Fundamental

Part of speech: adjective

Definition: Pertaining to the foundation or basis; serving for the foundation. Hence: Essential, as an element, principle, or law; important; original; elementary; as, a fundamental truth; a fundamental axiom.

Part of speech: noun

Definition: A leading or primary principle, rule, law, or article, which serves as the groundwork of a system; essential part, as, the fundamentals of linear algebra.

Overtone

Part of speech: noun

Definition: A tone whose frequency is an integer multiple of another; a harmonicAn implicit meaning, especially an ulterior one.