aeolian Your browser does not support the audio element. [ Greek ] Definition A mode used in Gregorian chant based upon the sixth tone of the major scale. In the key of C , the aeolian mode would be based on A , and would include A , B , C , D , E , F, G , A . Share Share on Facebook (opens in a new tab) Share on X (opens in a new tab) Last Updated: 2014-03-01 13:38:32