King James Bible

SUB'TILTY, noun [Latin subtilitas.]

1. Thinness; fineness; exility; in a physical sense; as the subtilty of air or light; the subtilty of sounds.

2. Refinement; extreme acuteness.

Intelligible discourses are spoiled by too much subtilty in nice divisions.

3. Slyness in design; cunning; artifice; usually but less properly written subtlety.