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fundamental law

American  

noun

  1. the organic law of a state, especially its constitution.


fundamental law British  

noun

  1. the law determining the constitution of the government of a state; organic law

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of fundamental law

First recorded in 1910–15

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The mattering instinct “implicates both the most fundamental law of the science of matter, the law of entropy,” as well as “the biological imperative to resist it.”

From The Wall Street Journal • Jan. 9, 2026

A similar attempt to change the fundamental law failed in 2019 because turnout was below a required 50% of registered voters to be valid.

From Seattle Times • May 9, 2024

That’s the way a democratic process works, that’s the fundamental law of the country, the Constitution.

From Slate • Feb. 5, 2024

All that changed in the 1850s, when scientists uncovered a fundamental law of physics with terrifying implications.

From Salon • Oct. 8, 2023

It is a fundamental law of Nature, as basic as gravity.

From "Cosmos" by Carl Sagan

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