Emily Dickinson Lexicon

SLEIGHT, n. [slite; G. schlich, trick, cunning; schlicht, plain, sleek; Sw. slög, dextrous; D. sluik, underhand; sluiken, to smuggle; Ir. slightheach, sly.]

1. An artful trick; sly artifice; a trick or feat so dextrously performed that the manner of performance escapes observation; as, sleight of hand; Fr. legerdemain. Not improbably sleight and Fr. leger, light, may have a common origin.
2. Dextrous practice; dexterity.