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seventh chord

noun Music.
  1. a chord formed by the superposition of three thirds.
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Origin of seventh chord

First recorded in 1905–10
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for seventh chord

seventh chord

noun
  1. music a chord consisting of a triad with a seventh added above the rootSee dominant seventh chord, diminished seventh chord, major seventh chord, minor seventh chord
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012