Extended Chords are chords extended past seventh chords.
If we stack a third upon any seventh chord we now have a Ninth Chord. If we stack a third upon any ninth chord we now have an Eleventh Chord. Finally, if we stack a third upon any eleventh chord we now have a Thirteenth Chord.
Examples of Extended Chords:
Learn about Basic Chords and Seventh Chords
Learn about Chord Symbols
