What is the definition of demure?

The Southern Gothic author usually avoids perpetuating Antebellum stereotypes like the contented slave, the demure Southern belle, the chivalrous gentleman, or the righteous Christian preacher. Instead, the writer takes classic Gothic archetypes, such as the damsel in distress or the heroic knight, and portrays them in a more modern and realistic manner — transforming them into, for example, a spiteful and reclusive spinster, or a white-suited, fan-brandishing lawyer with ulterior motives.