Definition: A diminished interval is an interval that has been flattened by a half step. Compare the following chords:
- B Minor Chord (Bmin):
Root: B
Minor Third: F
Perfect Fifth: D♯ - B Diminished Chord (B°):
Root: B
Minor Third: F
Diminished Fifth: D
Also Known As:
- intervallo diminuito (It)
- intervalle diminué (Fr)
- verminderte Intervall (Ger)

