In music theory, a dominant seventh chord, or major minor seventh chord, is a chord composed of a root, major third, perfect fifth, and minor seventh. It can be also viewed as a major triad with an additional minor seventh. When using popular-music symbols, it is denoted by adding a superscript "7" after the letter designating the chord root.
The half-diminished seventh chord is the involution of the German augmented sixth chord. Its interval of minor seventh (between root and seventh degree, i.e.: { C B ♭} in { C E ♭ G ♭ B ♭} ) can be written as an augmented sixth { C E ♭ G ♭ A ♯}.
In music, a major seventh chord is a seventh chord where the "third" note is a major third above the root, and the "seventh" note is a major seventh above the root (a fifth above the third note) play (help · info).
Most typically, minor seventh chord refers to where the "seventh" note is a minor seventh above the root (a fifth above the third note). This is more precisely known as a minor/minor seventh chord, and it can be represented as either as m 7 or − 7, or in integer notation, {0, 3, 7, 10}.