/ Dictionary / Index F fundamental law: Meaning and Definition of Find definitions for: fun'damen'tal law' Pronunciation: [key] the organic law of a state, esp. its constitution. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fundamentalism fundamental particle Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language