In this essay I analyze the plain style as conceived of and used by the Lollards, a late fourteenth-century religious group. I argue that the same practices that set Lollard reading and writing apart from orthodox discourse were foundational to the Lollards' departures from orthodox belief, theorizing language and style in such a way that meaning was free from priestly mediation. This demonstrates the importance of the Lollard plain style as both a marker of heresy and a precursor to subsequent notions of plainness.