Definition of "playne"

There hast thou in the playne texte greate lerninge, greate frute and greate edifienge which I passe over because of tediousnes. Then come I, when I preach of the law and the gospell, and borow this example to expresse the nature of the law and of the Gospell and the paynte it unto the before thine eyes.

Literal Figures: Puritan Allegory and the Reformation Crisis in Representation