from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The third tone in a diatonic musical scale, determining the major or minor quality of the tonic chord.

from The Century Dictionary.

  • noun In Gregorian music, one of the principal tones of a mode, situated as nearly as possible midway between the dominant and the final, and ranking next in importance to them.
  • noun In modern music, the third tone of the scale. The scale is major or minor according as the mediant is a major or a minor third above the key-note.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Mus.) The third above the keynote; -- so called because it divides the interval between the tonic and dominant into two thirds.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun music The third degree of the diatonic scale.
  • noun mathematics A rational number whose numerator is the sum of the numerators of two other given rational numbers and whose denominator is the sum of the denominators of those same two other rational numbers.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun (music) the third note of a diatonic scale; midway between the tonic and the dominant


from The American Heritage® Dictionary of the English Language, 4th Edition

[Italian mediante, from Late Latin mediāns, mediant-, present participle of mediāre, to be in the middle, from Latin medius, middle; see medium.]



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