The maj11 chord is a rich, beautiful extension of the major triad, adding depth and color to progressions. It retains all the notes of the major triad and extends to include the 7th, 9th, and 11th intervals. This chord is less common than the standard major chord due to its complexity, but when used, it can add an ethereal quality to a composition. In the key of C major, for example, the notes would include C (root), E (major third), G (perfect fifth), B (major seventh), D (ninth), and F# (sharp eleventh). The sharp 11th often adds a bright, shimmering quality. Understanding how the maj11 chord functions can greatly enhance a guitarist's ability to create lush, sophisticated harmonies. It's typically used in jazz and fusion music, where advanced harmonic structures are appreciated.