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Related to plagal: plagal cadence
Of or being a medieval mode having a range from the fourth below to the fifth above its final tone.
1. (Classical Music) (of a cadence) progressing from the subdominant to the tonic chord, as in the Amen of a hymn
2. (Classical Music) (of a mode) commencing upon the dominant of an authentic mode, but sharing the same final as the authentic mode. Plagal modes are designated by the prefix Hypo- before the name of their authentic counterparts: the Hypodorian mode.
[C16: from Medieval Latin plagālis, from plaga, perhaps from Greek plagos side]
1. (of a church mode) having the final in the middle of the compass. Compare authentic (def. 4a).
2. (of a cadence) progressing from the subdominant to the tonic chord. Compare authentic (def. 4b).