Explanations
Abbreviations are often used in chord names (alternative chord symbols in parentheses).
Db - D flat major (Db△)
Dbm - D flat minor
Db7 - D flat dominant seventh
Dbm7 - D flat minor seventh
Dbmaj7 - D flat major seventh (Db△7)
DbmM7 - D flat minor major seventh
Db6 - D flat major sixth
Dbm6 - D flat minor sixth
Db6/9 - D flat sixth/ninth (sixth added ninth)
Db5 - D flat fifth
Db9 - D flat dominant ninth
Dbm9 - D flat minor ninth
Dbmaj9 - D flat major ninth
Db11 - D flat eleventh
Dbm11 - D flat minor eleventh
Db13 - D flat thirteenth
Dbm13 - D flat minor thirteenth
Dbmaj13 - D flat major thirteenth
Dbadd - D flat add
Db7-5 - D flat seven minus five
Db7+5 - D flat seven plus five
Dbsus - D flat suspended
Dbdim - D flat diminished (Db°)
Dbdim7 - D flat diminished seventh (Db°7)
Dbm7b5 - D flat minor seventh flat five (Dbø)
Dbaug - D flat augmented (Db+)
Dbaug7 - D flat augmented seventh