Sub″tle‐ty (?), n.; pl.Subtleties (#). [OE. sotelte, sutilte, OF. sotillete, L. subtilitas. See Subtle, and cf. Subtility.] 1. The quality or state of being subtle, or sly; cunning; craftiness; artfulness.
The fox which lives by subtlety. Shak.
2. Nice discernment with delicacy of mental action; nicety of discrimination.
3. Something that is sly, crafty, or delusive.
Unlearned in the world's false subtleties. Shak.