The antics or tricks of a knave; boyish mischief. / An unprincipled action; deceit.

(uncountable) The condition of being a knave (used mockingly) / (countable, obsolete, Scotland) A quantity of corn or flour due to a miller's servant from each batch in a thirlage mill

For a system or body: protected, or designed to be proof against misuse or error; fail-safe. / For an idea or plan: infallible, or bulletproof.

plural of knavess

(archaic) A knavish woman.

plural of knavery

plural of knaveship