Chord Symbols
Type Abbreviations, Signs
Major M, Maj., maj.
*Minor m
*Diminshed dim.
*Augmented Aug., aug., + (+5)
Sixth 6
Minor Sixth m6
Dominant Seventh 7
Major Seventh maj.7
Minor Seventh m7
Ninth 9
Major Ninth maj.9
Eleventh 11
Thirteenth 13
*Suspended sus (sus4)

*Minor: “min” is considered out-of-date.
*Diminished: “d” and small “o” are not generally used in published music.
*Suspended: “sus4” is considered redundant, since the sus automatically refers to the 4th