Definition: A dominant seventh chord is a major triad chord with an added minor seventh interval above the root. For example:
G Dominant Seventh Chord (G7):
(Note: A dominant seventh chord is often referred to as simply a “seventh chord.” However, “seventh chord” is really a blanket term; there are several varieties of seventh chords, including maj7, min7, and dim7.)
A dominant 7th chord may be abbreviated with the root note plus 7; or, less commonly, dom7.
G Dominant Seventh Chord (G7):
- Root: G
- Major Third: B
- Perfect Fifth: D
- Minor Seventh: F
(Note: A dominant seventh chord is often referred to as simply a “seventh chord.” However, “seventh chord” is really a blanket term; there are several varieties of seventh chords, including maj7, min7, and dim7.)
A dominant 7th chord may be abbreviated with the root note plus 7; or, less commonly, dom7.
Dominant Seventh Flat Five Chords
A 7♭5 is built like a dominant 7th chord, but has a diminished fifth:- G7♭5: G - B - D♭ - F
Also Known As:
- major/minor seventh chord (M/m7)
- settima di dominante (It)
- accord de septième de dominante (Fr)
- Dominantseptakkord (Ger)

