dorian DOR-ree-en Your browser does not support the audio element. [ Greek ] Definition A mode used in Gregorian chant based upon the second tone of the major scale. In the key of C, the Dorian mode would be based on D, and would include the pitches D, E, F, G, A, B, C, and D. Share Share on Facebook (opens in a new tab) Share on X (opens in a new tab) Last Updated: 2016-05-23 18:51:36