The term ‘minor’ refers to the b3rd. This is a C minor chord with a dominant or b7th. If we were to raise the 7th, we would have a C minor chord with a major 7th. Now check Example 5!

Hence Am or Cm becomes A minor or C minor. Due to this simplistic ... differentiate between this chord type, and the chord described as a major 7th. When you see the symbol C maj7, the ‘maj7 ...

All the chords built on other notes in the scale of C are minor, except chord VII - the notes B – D – F, which is diminished. When a seventh is added to a chord this is known as a seventh chord.