Emily Dickinson Lexicon

SKEP'TIC, n. [Gr. σκεπτικος, from σκεπτομαι, to look about, to consider, to speculate; Sax. sceawian, to look about, to see, also to show. See Show.]

1. One who doubts the truth and reality of any principle or system of principles or doctrines. In philosophy, a Pyrrhonist or follower of Pyrrho, the founder of a sect of skeptical philosophers, who maintained that no certain inferences can be drawn from the reports of the senses, and who therefore doubted of every thing. – Enfield.
2. In theology, a person who doubts the existence and perfections of God, or the truth of revelation; one who disbelieves the divine original of the Christian religion. Suffer not your faith to be shaken by the sophistries of skeptics. – Clarke.