DICT.TW Dictionary Taiwan

 Fun·da·men·tal a.  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.
    The fundamental reasons of this war.   --Shak.
    Some fundamental antithesis in nature.   --Whewell.
 Fundamental bass Mus., the root note of a chord; a bass formed of the roots or fundamental tones of the chords.
 Fundamental chord Mus., a chord, the lowest tone of which is its root.
 Fundamental colors, red, green, and violet-blue. See Primary colors, under Color.