n. Same as subtilty, 1.n. Acuteness of intellect; delicacy of discrimination or penetration; intellectual activity; subtility.n. Same as subtilty, 2.n. Slyness; artifice; cunning; craft; stratagem; craftiness; artfulness; wiliness.n. Also subtilty.n. That which is subtle or subtile. Also subtilty.n. That which is intellectually acute or nicely discriminating.n. That which is of false appearance; a deception; an illusion.n. Same as subtilty, 6.