[pla.gal] adj [ML plagalis, ultim. fr. Gk plagios oblique, sideways, fr. plagos side; akin to L plaga net, region, Gk pelagos sea] (1597) 1 of a church mode: having the keynote on the 4th scale step--compare authentic 4a
2. of a cadence: progressing from the subdominant chord to the tonic--compare authentic 4b