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Definition of: fundamental
(fun′də·men′təl) adjective
1. Relating to or constituting a foundation; indispensable; basal.
2. Geol. Located at the bottom; constituting the lowest stratum or formation: fundamental rock.
3. Music Radical: applied to the lowest note of a chord, considered as being its foundation or root.
4. Physics Designating that component of a wave form or other periodic oscillation on which all harmonic frequencies are based. See synonyms under RADICAL.
—noun
1. Anything that serves as the foundation or basis of a system of belief, as a truth, law, or principle; a primary and necessary truth; an essential.
2. Music The note on which a chord is formed.
3. Physics That frequency on which a harmonic or group of harmonics is based.
—fun′·da·men′tal·ly adverb
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