What is the meaning of Sly?

Artfully cunning; secretly mischievous; wily.

Dexterous in performing an action, so as to escape notice

Done with, and marked by, artful and dexterous secrecy; subtle

Light or delicate; slight; thin.

Slyly.

Obsolete spelling of zły (bad, evil).

Judicious, considered, shrewd; having or indicative of great wisdom.

Adept, expert, quality; having or indicative of great expertise.

Sly, artful, wily; employing or being an example of deception.

Attractive; having good looks.

Unknown or hidden.

An (instance or collection of) young broad-leaved trees or saplings (in particular while growing densely, sometimes in a weed-like fashion). (Is there an English equivalent to this definition?)

Source: wiktionary.org