Eleventh chord

In music theory, an eleventh chord is a chord that contains the tertian extension of the eleventh. Typically found in jazz, an eleventh chord also usually includes the seventh and ninth, and elements of the basic triad structure. Variants include the dominant eleventh (C11, C–E–G–B♭–D–F), minor eleventh (Cm11, C–E♭–G–B♭–D–F), and major eleventh chord (Cmaj11, C–E–G–B–D–F). Using an augmented eleventh produces the dominant sharp eleventh (C9♯11, C–E–G–B♭–D–F♯) and major sharp eleventh (Cmaj9♯11, C–E–G–B–D–F♯) chords.

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