fundamental
Americanadjective
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serving as, or being an essential part of, a foundation or basis; basic; underlying.
fundamental principles;
the fundamental structure.
- Synonyms:
- primary, indispensable
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of, relating to, or affecting the foundation or basis.
a fundamental revision.
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being an original or primary source.
a fundamental idea.
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Music. (of a chord) having its root as its lowest note.
noun
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a basic principle, rule, law, or the like, that serves as the groundwork of a system; essential part.
to master the fundamentals of a trade.
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Also called fundamental tone. Also called fundamental note,. Music.
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the root of a chord.
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the generator of a series of harmonics.
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Physics. the component of lowest frequency in a composite wave.
adjective
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of, involving, or comprising a foundation; basic
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of, involving, or comprising a source; primary
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music denoting or relating to the principal or lowest note of a harmonic series
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of or concerned with the component of lowest frequency in a complex vibration
noun
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a principle, law, etc, that serves as the basis of an idea or system
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the principal or lowest note of a harmonic series
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the bass note of a chord in root position
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Also called: fundamental frequency. first harmonic. physics
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the component of lowest frequency in a complex vibration
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the frequency of this component
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Other Word Forms
- fundamentality noun
- fundamentally adverb
- fundamentalness noun
- nonfundamental adjective
- nonfundamentally adverb
- unfundamental adjective
- unfundamentally adverb
Etymology
Origin of fundamental
First recorded in 1400–50; late Middle English, from Medieval Latin fundāmentālis “of, belonging to a foundation”; fundament, -al 1
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.
While that argument addresses quality-control concerns associated with the gray market, it doesn’t confront the fundamental question of whether peptides are safe.
From Salon • Apr. 4, 2026
Additionally, Goldman Sachs predicts that central bank demand will remain a fundamental pillar of support, averaging about 60 metric tons monthly, once price volatility dissipates.
From MarketWatch • Apr. 2, 2026
“What we’re seeing in the market today is much more about supply recovery and timing shifts than any fundamental change in consumption,” said CEO Sherman Miller on the earnings call.
From Barron's • Apr. 1, 2026
In a statement, minister Paul Givan said that "high‑quality education is fundamental to the wellbeing of our children and to the future prosperity of Northern Ireland".
From BBC • Apr. 1, 2026
“I didn’t expect fundamental deterioration in the underlying mortgage pools to hit critical levels for a couple years,” he said—when the teaser rates would vanish and monthly payments would skyrocket.
From "The Big Short" by Michael Lewis
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
