- a chord formed by the superposition of four thirds.
Origin of ninth chord
First recorded in 1945–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a chord much used in jazz and pop, consisting of a major or minor triad with the seventh and ninth added above the rootOften shortened to: ninth
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