The A dominant eleventh chord (abbreviated "A11 chord") is a six-note chord consisting of the notes A, C, E, G, B, and D. The chord is formed by adding an eleventh to a A dominant ninth chord.

In practice, the third (C) and fifth (E) are often omitted from the A11 chord to avoid a very dissonant sound, and because it's not always possible to play all notes simultaneously.

Name
A dominant eleventh chord
Notes
A C E G B D
Intervals
1 3 5 7 9 11
Chord symbol
A11
Type
hexad (six-note chord)

A11 chord on piano

A11 chord on guitar

A11 chord on ukulele

A11 chord on the staff